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The pedigree shown in Figure 1, numbered by individual, tracks the instances of color blindness within the family. Squares are male, circles are female, and each half of a shape represents one of the two copies of the gene. Shading represents that the allele for color blindness is present.
Of the individuals with a "?", identify which of them is heterozygous. (Final Answer is a value)
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|
The following figure shows the transfer of energy through a forest community. According to the information in the figure, what is the proportion of energy entering the first trophic level that is passed to the second trophic level? Express your answer as a value between 0 and 1, rounded to the nearest hundredth. (Final Answer is a value)
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Oxygen is transported throughout the body by hemoglobin molecules within red blood cells. The blood types A, B, and O identify red blood cells distinguished by specific sugars attached to membrane-bound proteins. There are three alleles (A, B, and O), two of which (A and B) code for enzymes that attach a specific sugar to the membrane-bound protein. The combination of any two of the three alleles results in six genotypes, producing four phenotypes, A, B, AB, and O.
The following figure of a phylogenetic tree shows the nucleotide substitutions, deletions, and insertions for one possible explanation for the evolution of the ABO allele group.
According to the phylogenetic tree, what is the alleles that is the most likely ancestral? (Answer is a single letter.)
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[
"\\boxed{A }"
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Questions refer to the graph below that plots the temperature of water as a function of heat energy absorbed.
1. What state of matter does the line labeled X represent? (Answer is a single word.)
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[
"\\boxed{liquid}"
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|
Questions refer to the graph below that plots the temperature of water as a function of heat energy absorbed.
What part of the graph represents the cooling effect of sweating? (Answer is a single letter.)
|
[
"\\boxed{Y}"
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Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in the table below. The scientists used this data to create the phylogenetic tree shown below with positions labeled I, II, III, and IV as well as O, P, Q, R, and S.
According to the figure provided,which is the LEAST possible location for Gerdellen to be placed? (Answer is a single letter.)
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Shown in the diagram is a graph of $f'$, the derivative of function $f$. If $f(3) = 3$, then $f(1)=$?
A. \frac{10}{3}
B. \frac{13}{3}
C. -\frac{5}{3}
D. 4
E. 6
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"\\boxed{B}"
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A graph of function $f(x)$ on the interval $[-1, 4]$ is shown. Regions A, B, and C have areas of 1, 2, and 3 respectively. What is $\int_{-1}^{4} (f(x) + 2) dx$?
A. 2
B. 4
C. 10
D. 12
E. 16
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|
Shown above is a slope field for which of the following differential equations?
A. $\frac{dy}{dx} = \frac{x}{y}$
B. $\frac{dy}{dx} = xy$
C. $\frac{dy}{dx} = x + y$
D. $\frac{dy}{dx} = x - y$
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[
"\\boxed{C}"
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|
In northwest Pennsylvania, a zoologist recorded the ages, in months, of 55 bears and whether each bear was male or female. The data are shown in the back-to-back stemplot below. Based on the stemplot, which of the following statements is true?
(A) The median age and the range of ages are both greater for female bears than for male bears.
(B) The median age and the range of ages are both less for female bears than for male bears.
(C) The median age is the same for female bears and male bears, and the range of ages is the same for female bears and male bears.
(D) The median age is less for female bears than for male bears, and the range of ages is greater for female bears than for male bears.
(E) The median age is greater for female bears than for male bears, and the range of ages is less for female bears than for male bears.
|
[
"\\boxed{A}"
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|
A state educational agency was concerned that the salaries of public school teachers in one region of the state, region A, were higher than the salaries in another region of the state, region B. The agency took two independent random samples of salaries of public school teachers, one from region A and one from region B. The data are summarized in the table below. Assuming all conditions for inference are met, do the data provide convincing statistical evidence that the salaries of public school teachers in region A are, on average, greater than the salaries of public school teachers in region B?
(A) Yes, there is evidence at the significance level of a= 0.001.
(B) Yes, there is evidence at the significance level of a=0.01 but not at a=0.001.
(C) Yes, there is evidence at the significance level of a=0.05 but not at a=0.01.
(D) Yes, there is evidence at the significance level of a=0.10 but not at a=0.05.
(E) No, there is no evidence at the significance level of a=0.10.
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[
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|
The number of siblings was recorded for each student of a group of 80 students. Some summary statistics and a histogram displaying the results are shown below. An outlier is often defined as a number that is more than 1.5 times the interquartile range below the first quartile or above the third quartile. Using the definition of an outlier and the given information, which of the following can be concluded?
(A) The median is greater than the mean, and the distribution has no outliers.
(B) The median is greater than the mean, and the distribution has only one outlier.
(C) The median is greater than the mean, and the distribution has two outliers.
(D) The median is less than the mean, and the distribution has only one outlier.
(E) The median is less than the mean, and the distribution has two outliers.
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|
The following cumulative graph gives the electricity demand of a certain town.The power plant that provides electricity to this town is capable of generating 12,000 kW daily. On what percent of days will the power plant not be able to meet the demand for electricity?
A. About 3 percent
B. About 60 percent
C. About 80 percent
D. About 92 percent
E. About 97 percent
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[
"\\boxed{A}"
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|
Sixty pairs of measurements were taken at random to estimate the relation between variables X and Y. A least squares regression line was fitted to the collected data. The resulting residual plot is as follows. Which of the following conclusions is appropriate?
A. A line is an appropriate model to describe the relation between X and Y.
B. A line is not an appropriate model to describe the relation between X and Y.
C. The assumption of normality of errors has been violated.
D. The assumption of constant sample standard deviations has been violated.
E. The variables X and Y are not related at all.
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|
For the histogram pictured above, what is the class interval (boundaries) for the class that contains the median of the data?
A. (5, 7)
B. (9, 11)
C. (11, 13)
D. (15, 17)
E. (7, 9)
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|
Thirteen large animals were measured to help determine the relationship between their length and their weight. The natural logarithm of the weight of each animal was taken and a least-squares regression equation for predicting weight from length was determined. The computer output from the analysis is given below. Give a 99% confidence interval for the slope of the regression line. Interpret this interval.
A. (0.032, 0.041); the probability is 0.99 that the true slope of the regression line is between 0.032 and 0.041.
B. (0.032, 0.041); 99% of the time, the true slope will be between 0.032 and 0.041.
C. (0.032, 0.041); we are 99% confident that the true slope of the regression line is between 0.032 and 0.041.
D. (0.81, 1.66); we are 99% confident that the true slope of the regression line is between 0.032 and 0.041.
E. (0.81, 1.66); the probability is 0.99 that the true slope of the regression line is between 0.81 and 1.66.
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[
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|
The following is a probability histogram for a discrete random variable X. What is $\mu_x$.
A. 3.5
B. 4.0
C. 3.7
D. 3.3
E. 3.0
|
[
"\\boxed{D}"
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|
Breakfast cereals have a wide range of sugar content. Some cereals contain High Fructose Corn Syrup (HFCS) as a source of sugar and some do not. The boxplots above show the total sugar content of different types of cereal for those containing HFCS and for those that do not. Which statement is true based on the boxplots?
A. The number of cereals with HFCS is about the same as the number of cereals without HFCS.
B. The cereals with HFCS have a greater interquartile range than the cereals without HFCS.
C. The cereals without HFCS have a greater range than the cereals with HFCS.
D. About half the cereals without HFCS have less sugar than about three-fourths of the cereals with HFCS.
E. About half the cereals with HFCS have more sugar than about three-fourths of the cereals without HFCS.
|
[
"\\boxed{E}"
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|
Researchers were gathering data on alligators in an attempt to estimate an alligator's weight from its length. They captured 29 alligators and measured their length and weight. They created three regression models. Each model, along with its residual plot, is shown below. yrepresents the weight in pounds and xrepresents the length in inches.Which statement is true?
A. There is a linear relationship between weight and length, and model I is most appropriate.
B. There is a linear relationship between weight and length, and model II is most appropriate.
C. There is a nonlinear relationship between weight and length, and model I is most appropriate.
D. There is a nonlinear relationship between weight and length, and model II is most appropriate.
E. There is a nonlinear relationship between weight and length, and model III is most appropriate.
|
[
"\\boxed{D}"
] |
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|
The graph of f(x) is given above. Which of the following statements is true about f"(x) ?
A. f"(x) > 0 for all values of x
B. f"(x) < 0 for all values of x
C. f"(x) < 0 for -2 < x < -1 and f"(x) > 0 for -1 < x < 1 and x > 2
D. f"(x) > 0 for -2 < x < 0 and x > 2, and f"(x) < 0 for 0 < x < 2
|
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"\\boxed{D}"
] |
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] | null | 856
|
The position of a particle, s, is given above for 0 ⤠t ⤠10. On what interval(s) is the particle slowing down?
A. 2 ⤠t ⤠6
B. 0 ⤠t ⤠4
C. 0 ⤠t ⤠2 UU 4 ⤠t ⤠6
D. 2 ⤠t ⤠6 U 6 ⤠t ⤠10
|
[
"\\boxed{C}"
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] | null | 857
|
Question: 26
Data values represented by the bar labeled "10" in the histogram below fall into which range?
A. 7.5 up to 12.5
B. 7.25 up to 12.75
C. 8.5 up to 11.5
D. 8.75 up to 11.75
E. 8.75 up to 11.25
|
[
"\\boxed{E}"
] |
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|
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"images/7e5364b5-308c-47f3-945a-af50fc76cdba-0.jpg"
] | null | 858
|
Question: 63
Five students had five tests in one semester, and every test was graded on a scale of 0 to 20 points. Based on information from the table, which of the following students had the largest variance in his or her results, and which student had the largest mean value?
A. James had the largest variance, while Mike had the largest mean score.
B. Mike had the largest mean score and the largest variance.
C. Tina had the largest variance, while James had the highest mean score.
D. Tina had the largest variance, while Mark had the largest mean score.
E. Angela had the largest variance, while Mike had the largest mean score.
|
[
"\\boxed{A}"
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] | null | 859
|
Question: 75
In the scatter plot, how could the data be transformed in order to do a linear regression?
A. By squaring each data point y-value
B. By taking the natural logarithm of each data point y-value
C. By raising each data point y-value to the base 10
D. By taking the square root of each data point y-value
E. By cubing each data point y-value
|
[
"\\boxed{D}"
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] | null | 860
|
Question: 88
Find and interpret r for the dataset.
A. r = 0.0903. There is a weak positive linear correlation.
B. r = -0.0903. There is a weak negative linear correlation.
C. r = 0.903. There is a strong positive linear correlation.
D. r = -0.903. There is a strong negative linear correlation.
E. r = 0.0903. There is no linear correlation.
|
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"\\boxed{D}"
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] | null | 861
|
Question: 97
From the regression output below, calculate the percentage of unexplained variation in the dependent (response) variable.
A. 1.8%
B. 1.9%
C. 96.4%
D. 98.1%
E. 98.2%
|
[
"\\boxed{E}"
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[
"images/6eb0fecd-d104-4061-9d5a-259747486504-0.jpg"
] | null | 862
|
Question: 175
What should be the height of the missing bar in the histogram?
A. 75
B. 0.7
C. 70
D. 60
E. 50
|
[
"\\boxed{A}"
] |
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] | null | 863
|
Question: 176
Suppose a cell phone company manufactures cell phones and tablets in the following four states: Arizona, California, Washington, and Minnesota. The table below shows the percentage of total output by state, and within each state, the percentage output of each product. What is the probability that a randomly selected product will be a tablet manufactured in Minnesota? (Assume that all products are shipped from one distribution center.)
A. 0.05
B. 0.08
C. 0.004
D. 0.5
E. 0.04
|
[
"\\boxed{C}"
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|
Question: 204
The dataset below is based on a survey of 100 randomly selected travelers who were asked, "How many trips per year do you typically take?"
What is the probability that a randomly selected survey participant is male or takes two or fewer trips per year?
A. 0.17
B. 0.18
C. 0.36
D. 0.69
E. 0.86
|
[
"\\boxed{D}"
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] | null | 865
|
Question: 266
In a recent online survey of 1,700 adults, it was revealed that only 17% felt the Internet was secure. With what degree of confidence can you say that 17% ± 2% of adults believe that online security is secure?
A. 72.9%
B. 90%
C. 95%
D. 97.2%
E. 98.6%
|
[
"\\boxed{D}"
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] | null | 866
|
Question: 283
While weighing five infants in the hospital we found their weights in kilograms to be 3.1, 3.5, 2.8, 3.2, and 3.4. What is a 90% confidence interval estimate of the infants' weights?
A. 3.2 ± 0.202
B. 3.2 ± 0.247
C. 3.2 ± 0.261
D. 4.0 ± 0.202
E. 4.0 ± 0.261
|
[
"\\boxed{C}"
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] | null | 867
|
Question: 284
A poll identifies the proportions of high-income and low-income voters who support a decrease in taxes. If we need to know the answer to be within ± 0.02 at the 95% confidence interval, what sample size should be taken?
A. 3383
B. 4803
C. 7503
D. 9453
E. 4503
|
[
"\\boxed{B}"
] |
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] | null | 868
|
Question: 325
In a sample of 500 students from statistics courses in the fall semester, 312 earned a grade of C or higher. In the spring semester, 400 of the 525 students sampled earned a grade of C or higher. If we treat the fall semester as "sample 1" and the spring semester as "sample 2," what is the appropriate standardized test statistic to determine whether a smaller proportion of students passed in the fall?
A. z = -6.699
B. z = -4.792
C. z = 4.792
D. z = 6.699
E. The z-test statistic depends on the level of significance of the test
|
[
"\\boxed{B}"
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] | null | 869
|
Question: 399
A student is studying the relationship between the number of hours students work and their final exam scores in statistics courses. A regression analysis resulted in the computer output below.
What is the p-value that should be used to test H0 : β = 0 versus Ha : β > 0?
A. 0
B. 0.146
C. 0.292
D. 0.708
E. 0.854
|
[
"\\boxed{B}"
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] | null | 870
|
Question: 400
A student is studying the relationship between the number of hours students work and their final exam scores in statistics courses. A regression analysis resulted in the computer output below.
What is the t-test statistic that should be used to test H0 : β = 0 versus Ha : β â 0?
A. -3.22
B. -1.61
C. -0.805
D. 5.655
E. 11.31
|
[
"\\boxed{B}"
] |
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[
"images/77916314-01fd-469d-83b3-6ee6cfaba10f-0.jpg"
] | null | 871
|
Question: 401
A student is studying the relationship between the number of hours students work and their final exam scores in statistics courses. A regression analysis resulted in the computer output below.
If the student used a sample of 10, which of the following is the 95% confidence interval for the true slope of the regression line based on this dataset?
A. -0.4195 ± 10.1695
B. -0.4195 ± 23.451
C. -0.4195 ± 0.2605
D. -0.4195 ± 0.601
E. -0.4195 ± 11.957
|
[
"\\boxed{D}"
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] | null | 872
|
Question: 413
A public opinion poll surveyed a simple random sample of voters. Respondents were classified by gender and by voting preference (Republican, Democratic, or independent). Results are shown below.
If you conduct a chi-squared test for independence, what is the expected frequency count of male independents?
A. 40
B. 50
C. 60
D. 180
E. 270
|
[
"\\boxed{A}"
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|
Question: 423
For the following two-way table, compute the value of Ï2.
A. 1.45
B. 4.167
C. 5.2
D. 5.55
E. None of the above
|
[
"\\boxed{B}"
] |
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|
[
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] | null | 874
|
Question: 424
A toy company published an advertisement in the local newspaper of a major city and in a children's magazine to see which medium generated more advertising viewership. A random sample of families was taken, and each family was asked to indicate where they had seen the product's advertisement. The results are summarized below.
The advertiser decided to use a chi-square test to see whether there was a relationship between the newspaper and the magazine scores. What would be the degrees of freedom for this test?
A. 3
B. 4
C. 7
D. 8
E. None of the above
|
[
"\\boxed{A}"
] |
dd035f8a-ce5c-41d0-8a48-ae4c3444a7da
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[
"images/dd035f8a-ce5c-41d0-8a48-ae4c3444a7da-0.jpg"
] | null | 875
|
Question: 437
A school class is going on a class trip, and a vote is being taken of where the class wants to go. The school expects that half of the students would want to go to Disney World, while the other half would want to go to visit Washington, DC Despite these expectations, only 42 students wanted to go to Washington, DC, while twice as many wanted to go to Disney World. Which of the following correctly identifies the chi-square statistic?
A. 4.1
B. 7
C. 14
D. 17.4
E. 22
|
[
"\\boxed{C}"
] |
c04b1425-c946-4458-a2f6-eed263ab4a95
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[
"images/c04b1425-c946-4458-a2f6-eed263ab4a95-0.jpg"
] | null | 876
|
Question: 449
Given the contingency table below, determine the expected frequency of cell 1, 3.
A. 83.7
B. 85
C. 115
D. 116.7
E. 899
|
[
"\\boxed{D}"
] |
4266d84f-5d54-464a-a2f2-f1169747d421
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[
"images/4266d84f-5d54-464a-a2f2-f1169747d421-0.jpg"
] | null | 877
|
Two half-cells are set up as follows:
Half-Cell A: Strip of Cu(s) in $CuNO_3(aq)$
Half-Cell B: Strip of Zn(s) in $Zn(NO_3)_2(aq)$
When the cells are connected according to the following diagram, the following reaction occurs. How many moles of electrons must be transferred to create 127 g of copper?
A. 1 mole of electrons
B. 2 moles of electrons
C. 3 moles of electrons
D. 4 moles of electrons
|
[
"\\boxed{B}"
] |
47780e92-0c51-433b-8e7d-22fbcf3811ca
|
[
"images/47780e92-0c51-433b-8e7d-22fbcf3811ca-0.jpg"
] | null | 878
|
Two half-cells are set up as follows:
Half-Cell A: Strip of Cu(s) in $CuNO_3(aq)$
Half-Cell B: Strip of Zn(s) in $Zn(NO_3)_2(aq)$
When the cells are connected according to the following diagram, the following reaction occurs. As the reaction progresses, what will happen to the overall voltage of the cell?
A. It will increase as [$Zn^{2+}$] increases.
B. It will increase as [$Cu^{+}$] increases.
C. It will decrease as [$Zn^{2+}$] increases.
D. The voltage will remain constant.
|
[
"\\boxed{C}"
] |
36f236f1-696f-49ba-b9d9-27f43a6d04c4
|
[
"images/36f236f1-696f-49ba-b9d9-27f43a6d04c4-0.jpg"
] | null | 879
|
$NO_2$ gas is placed in a sealed, evacuated container and allowed to decompose via the following equation:
$2NO_2(g) ↔ 2NO(g) + O_2(g)$
The graph below indicates the change in concentration for each species over time. What is happening to the rate of the forward reaction at t = 60 s?
A. It is increasing.
B. It is decreasing.
C. It is remaining constant.
D. It is zero.
|
[
"\\boxed{C}"
] |
539c1ceb-6892-4894-81b6-7ea164ddb409
|
[
"images/539c1ceb-6892-4894-81b6-7ea164ddb409-0.jpg"
] | null | 880
|
Regarding reaction II, to achieve the products present in the above diagram how many moles of each reactant must be present prior to the reaction?
A. 1.0 mol of CH$_4$ and 2.0 mol of H$_2$O
B. 2.0 mol of CH$_4$ and 2.0 mol of H$_2$O
C. 2.0 mol of CH$_4$ and 3.0 mol of H$_2$O
D. 3.0 mol of CH$_4$ and 2.0 mol of H$_2$O
|
[
"\\boxed{C}"
] |
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|
[
"images/480c4088-aab6-4eca-a2b8-650502512d66-0.jpg"
] | null | 881
|
The above diagrams shows the decomposition of hydrogen peroxide in a sealed container in the presence of a catalyst. What is the overall order for the reaction?
A. Zero order
B. First order
C. Second order
D. Third order
|
[
"\\boxed{B}"
] |
c0d19eec-8e82-4d26-a095-de9e271eedf2
|
[
"images/c0d19eec-8e82-4d26-a095-de9e271eedf2-0.jpg"
] | null | 882
|
One of the resonance structures for the nitrite ion is shown above. What is the formal charge on each atom?
A. O$_x$ -1; N +2; O$_y$ -1
B. O$_x$ +1; N -1; O$_y$ 0
C. O$_x$ 0; N 0 ; O$_y$ -1
D.O$_x$ -1; N 0 ; O$_y$ 0
|
[
"\\boxed{D}"
] |
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|
[
"images/4b1ce91e-9877-48d3-902b-af1f042c866d-0.jpg"
] | null | 883
|
What is the equilibrium expression for the reaction
A. \( K = \frac{[CO_2]^3}{[O_2]^5} \)
B. \( K = \frac{[C_3H_8][O_2]^5}{[CO_2]^3[H_2O]^4} \)
C. \( K = \frac{[C_3H_8]}{[H_2O]^4} \)
D. \( K = \frac{[O_2]^5}{[CO_2]^3} \)
|
[
"\\boxed{A}"
] |
77797645-ca01-49d8-89a0-46f7c5e7ad73
|
[
"images/77797645-ca01-49d8-89a0-46f7c5e7ad73-0.jpg"
] | null | 884
|
Given the two standard reduction equations and their potentials below, write the thermodynamically favored chemical reaction and its standard cell potential.
A. $\text{Ag}^+ (\text{aq}) + \text{Mg}^{2+} (\text{aq}) \rightarrow \text{Ag}(\text{s}) + \text{Mg}(\text{s}) & -1.57\ V $
B. $\text{Ag}^+ (\text{aq}) + \text{Mg}(\text{s}) \rightarrow \text{Ag}(\text{s}) + \text{Mg}^{2+} (\text{aq}) & +3.17\ V$
C. $2\text{Ag}^+ (\text{aq}) + \text{Mg}(\text{s}) \rightarrow 2\text{Ag}(\text{s}) + \text{Mg}^{2+} (\text{aq}) & +3.17\ V$
D. $2\text{Ag}^+ (\text{aq}) + \text{Mg}(\text{s}) \rightarrow 2\text{Ag}(\text{s}) + \text{Mg}^{2+} (\text{aq}) & +3.97\ V$
|
[
"\\boxed{C}"
] |
0e4a482e-ddf6-4bc9-9108-14913730fd6d
|
[
"images/0e4a482e-ddf6-4bc9-9108-14913730fd6d-0.jpg"
] | null | 885
|
Three 1-liter flasks are connected to a 3-liter flask by valves. The 3-liter flask is evacuated to start and the entire system is at 298K. The first flask contains helium, the second argon, and the third krypton. The pressure of the argon is 633 torr. The amounts of gas are proportional to their representations in the flasks. If all the valves to the center flask are opened, what will the pressure of the system be? Assume the connections have negligible volume.
A. 633 torr
B. 316 torr
C. 1266 torr
D. 211 torr
|
[
"\\boxed{B}"
] |
adbe8d49-64c8-4fbd-ac52-bee8e6e792dc
|
[
"images/adbe8d49-64c8-4fbd-ac52-bee8e6e792dc-0.jpg"
] | null | 886
|
The above graph shows a titration curve of a weak base titrated with a strong acid. The pH was measured with a pH meter after small volumes of 0.075 M HCl were added to 25.0 mL of a weak base. Data from that experiment are shown in the graph. Which arrow points to the end point of this titration?
A. A
B. E
C. C
D. F
|
[
"\\boxed{B}"
] |
415294a7-4f2c-4e7d-a661-7b668aedc0f7
|
[
"images/415294a7-4f2c-4e7d-a661-7b668aedc0f7-0.jpg"
] | null | 887
|
The above graph shows a titration curve of a weak base titrated with a strong acid. The pH was measured with a pH meter after small volumes of 0.075 M HCl were added to 25.0 mL of a weak base. Data from that experiment are shown in the graph. Find the two points on the curve that indicate the region where the solution can be described as a buffer. What is the change in pH from the first point to the second?
A. 0.5 pH unit
B. 1 pH unit
C. 2 pH units
D. 3 pH units.
|
[
"\\boxed{C}"
] |
4cb20f7d-afca-47fe-8164-2a03da83fa49
|
[
"images/4cb20f7d-afca-47fe-8164-2a03da83fa49-0.jpg"
] | null | 888
|
Three 1-liter flasks are connected to a 3-liter flask by valves as shown in the diagram above. The 3-liter flask has the relative number of helium atoms as indicated. At the start, the entire system is at 585K. The first flask contains oxygen; the second contains hydrogen, and the third contains nitrogen. The pressure of hydrogen is 3.00 atm. The number of gas molecules is proportional to their representations in the flasks. If the valves are all opened, what will be the pressure in the system? Assume the connections have negligible volume.
A. 1.0 atm
B. 2.0 atm
C. 3.0 atm
D. 4.0 atm
|
[
"\\boxed{B}"
] |
dc238e4c-6a3b-423c-8327-17a5ec37d81d
|
[
"images/dc238e4c-6a3b-423c-8327-17a5ec37d81d-0.jpg"
] | null | 889
|
Which of the labeled arrows in the diagram above represents the strongest intermolecular force of the four indicated?
A. Arrow A
B. Arrow B
C. Arrow C
D. Arrow D
|
[
"\\boxed{A}"
] |
f55d1929-ccd3-44ee-b20d-8c8b996893e4
|
[
"images/f55d1929-ccd3-44ee-b20d-8c8b996893e4-0.jpg"
] | null | 890
|
The diagram above shows the structure of molecules of CS$_2$ and COS. The boiling point of COS is 223 K, and the boiling point of CS2 is 319 K. Which of the following is the best explanation of why the boiling point of CS$_2$ is higher?
A. The molar mass of CS$_2$ is greater.
B. COS has weaker covalent bonds than CS$_2$.
C. Only CS$_2$ can form intermolecular dipole-dipole forces.
D. COS has stronger intermolecular forces because it is polar and CS$_2$ is not.
|
[
"\\boxed{A}"
] |
7b18d87c-d205-4233-9aa2-b0b5a1591978
|
[
"images/7b18d87c-d205-4233-9aa2-b0b5a1591978-0.jpg"
] | null | 891
|
In the diagram above, which labeled arrow is pointing toward a hydrogen bond?
A. 1
B. 2
C. 3
D. 4
|
[
"\\boxed{C}"
] |
b080e844-e135-4566-add0-726d6f03d5a7
|
[
"images/b080e844-e135-4566-add0-726d6f03d5a7-0.jpg"
] | null | 892
|
The graph above shows the distribution of kinetic energies of a large number of Ne atoms at 500 K. Which letter shows the average kinetic energy of this system?
A. A
B. B
C. C
D. D
|
[
"\\boxed{C}"
] |
f169da0b-974c-4288-b5ee-2b8145477c45
|
[
"images/f169da0b-974c-4288-b5ee-2b8145477c45-0.jpg"
] | null | 893
|
The graph above shows the distribution of kinetic energies of a large number of Ne atoms at 500 K. Which letter shows the average kinetic energy of this system?
A. A
B. B
C. C
D. D
|
[
"\\boxed{C}"
] |
2cdd03c4-882b-4bba-a908-9e1808e957d4
|
[
"images/2cdd03c4-882b-4bba-a908-9e1808e957d4-0.jpg"
] | null | 894
|
The above graph shows a titration curve of a weak base titrated with a strong acid. The pH was measured with a pH meter after small volumes of 0.075 M HCl were added to 25.0 mL of a weak base. Data from that experiment are shown in the graph. Which arrow points to the end point of this titration?
A. A
B. E
C. C
D. F
|
[
"\\boxed{B}"
] |
466c2087-0790-440b-a060-9529f6a8d18f
|
[
"images/466c2087-0790-440b-a060-9529f6a8d18f-0.jpg"
] | null | 895
|
A student is attempting to use a distillation apparatus, shown below, to separate a mixture of propanol (boiling point: 97°C) and propionic acid (boiling point: 141°C). Which temperature should the apparatus be set at to obtain as pure a distillate of propanol as possible?
A. 85°C
B. 105°C
C. 125°C
D. 145°C
|
[
"\\boxed{B}"
] |
cb1f4b59-c86b-43a0-adab-5cdc516dc5a8
|
[
"images/cb1f4b59-c86b-43a0-adab-5cdc516dc5a8-0.jpg"
] | null | 896
|
Two batteries are constructed via the diagram below. The concentration of the solutions and the mass of the electrodes are identified in the data below the diagram. How would the voltage and the battery life for the two batteries compare?Voltage Battery Life
A. X <Y X <Y
B. X <Y X =Y
C. X =Y X = Y
D. X =Y X < Y
|
[
"\\boxed{D}"
] |
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|
[
"images/c15114f0-59cc-45b1-b93a-cdd8a1487082-0.jpg"
] | null | 897
|
$Cu^{2+}$ ions appear blue in solution, and the $NO_3^-$ ion is colorless. The absorbance of a $Cu(NO_3)_2$ solution is measured at various wavelengths using a spectrophotometer. To determine the concentration of a $Cu(NO_3)_2$ solution of unknown concentration, what wavelength of light would produce the best results?
A. 350 nm
B. 500 nm
C. 640 nm
D. 800 nm
|
[
"\\boxed{C}"
] |
5424e2a4-16e9-4921-9df7-5f45a0ad73fd
|
[
"images/5424e2a4-16e9-4921-9df7-5f45a0ad73fd-0.jpg"
] | null | 898
|
Ox N Oy
One of the resonance structures for the nitrite ion is shown below. What is the formal charge on each atom?
A. -1 +1 -1
B. +1 -1 0
C. 0 0 -1
D. -1 0 0
|
[
"\\boxed{D}"
] |
0842a7b1-9a6d-4595-8af1-5e9fabd38246
|
[
"images/0842a7b1-9a6d-4595-8af1-5e9fabd38246-0.jpg"
] | null | 899
|
Identify the three gases represented on the Maxwell-Boltzmann diagram below. Assume all gases are at the same temperature.I II III
A. $H_2$ $N_2$ $F_2$
B. $H_2$ $F_2$ $N_2$
C. $F_2$ $N_2$ $H_2$
D. $N_2$ $F_2$ $H_2$
|
[
"\\boxed{C}"
] |
c3f4f423-2f80-4b0b-9cdd-a3427fbd156d
|
[
"images/c3f4f423-2f80-4b0b-9cdd-a3427fbd156d-0.jpg"
] | null | 900
|
The following curve is obtained during the titration of 30.0 mL of 1.0 M NH3, a weak base, with a strong acid:What is the concentration of the acid?
A. 0.5 M
B. 1.0 M
C. 1.5 M
D. 2.0 M
|
[
"\\boxed{D}"
] |
059b512e-0572-4e8b-b3d3-443a6b4ce3c3
|
[
"images/059b512e-0572-4e8b-b3d3-443a6b4ce3c3-0.jpg"
] | null | 901
|
The diagram below shows three identical 1.0 L containers filled with the indicated amounts of gas. The stopcocks connecting the containers are originally closed and the gases are all at 25°C. Assume ideal behavior.The stopcocks are opened. If the tubing connecting the containers has negligible volume, by what percentage will the pressure exerted by the neon gas decrease?
A. 25%
B. 33%
C. 50%
D. 67%
|
[
"\\boxed{D}"
] |
4ce54476-75d0-438a-82fd-d5fd2b0d170e
|
[
"images/4ce54476-75d0-438a-82fd-d5fd2b0d170e-0.jpg"
] | null | 902
|
The diagram below shows three identical 1.0 L containers filled with the indicated amounts of gas. The stopcocks connecting the containers are originally closed and the gases are all at 25°C. Assume ideal behavior. Which gas exerts the greatest pressure?
A. He
B. Ne
C. NO
D. All gases exert the same amount of pressure.
|
[
"\\boxed{A}"
] |
fb4be1a6-bbed-4296-a20e-1fd7342cc6de
|
[
"images/fb4be1a6-bbed-4296-a20e-1fd7342cc6de-0.jpg"
] | null | 903
|
Which of the following statements regarding the structure B is true?
There are several different potential Lewis diagrams for the sulfate ion, two of which are below.
A. The double bonds must be located opposite of each other due to additional electron repulsion.
B. It is a more polar molecule than the molecule represented by structure A.
C. The bonds in the molecule are weaker than those in structure A.
D. All bonds in the molecule are identical to each other.
|
[
"\\boxed{D}"
] |
d151ed9e-b499-4b04-87ba-3ba95cb5ec73
|
[
"images/d151ed9e-b499-4b04-87ba-3ba95cb5ec73-0.jpg"
] | null | 904
|
The marks on the following target represent someone who is:
A.accurate, but not precise.
B.precise, but not accurate.
C.both accurate and precise.
D.neither accurate nor precise.
|
[
"\\boxed{D}"
] |
86d8cbd6-2d7d-43f5-886e-9ab775ce72c9
|
[
"images/86d8cbd6-2d7d-43f5-886e-9ab775ce72c9-0.png"
] | null | 905
|
Pictured below is a schematic of the Rutherford experiment. Which scattered -particle gives the best evidence for the nuclear atom?
A. a
B. b
C. c
D. d
|
[
"\\boxed{A}"
] |
356b7ae1-b607-4bf1-a424-f814d18cc240
|
[
"images/356b7ae1-b607-4bf1-a424-f814d18cc240-0.png"
] | null | 906
|
What position on the standing wave shown below corresponds to a crest?
A. a
B. b
C. c
D. d
E. e
|
[
"\\boxed{B}"
] |
8e4cac95-94d0-49b0-8e66-512dab59d492
|
[
"images/8e4cac95-94d0-49b0-8e66-512dab59d492-0.png"
] | null | 907
|
The titration curves labeled 1 and 2 were obtained by titrating equal volumes of two different acid samples with portions of the same sodium hydroxide solution. What conclusions can be drawn about the relative concentrations and strengths of acids 1 and 2 from these curves?
(A) The concentrations are the same but acid 1 is weaker than acid 2.
(B) The concentrations are the same but acid 1 is stronger than acid 2.
(C) Acid 1 is the same strength as acid 2, but it is less concentrated.
(D) Acid 1 is the same strength as acid 2, but it is more concentrated.
|
[
"\\boxed{A}"
] |
371f8d5e-29f8-404d-84ac-0f3f98f4a4cc
|
[
"images/371f8d5e-29f8-404d-84ac-0f3f98f4a4cc-0.png"
] | null | 908
|
In an experiment, a solid 1 molar sample of Substance A was gradually heated by a source of constant energy for several hours and the temperature was measured periodically. At the end of the heating period, Substance A had been converted to the gas phase. The heating curve produced by this experiment is shown below. During the course of the experiment,Substance A was gradually heated from 100K to 350 K. When the temperature reached 250 K, the energy absorbed by Substance A?
(A} was used to change from liquid to gas phase.
(B) was used to change from gas to liquid phase.
(C) was used to change from solid to liquid phase.
(D) was used to change from liquid to solid phase.
(E) was reduced to zero.
|
[
"\\boxed{A}"
] |
00194e97-4dbb-46ab-9046-8c945f4fb510
|
[
"images/00194e97-4dbb-46ab-9046-8c945f4fb510-0.png"
] | null | 909
|
Which of the following is true of the reactions shown in the diagram above?
(A) The reaction is endothermic because the reactants are at a higher energy level than the products.
(B) The reaction is endothermic because the reactants are at a lower energy level than the products.
(C) The reaction is exothermic because the reactants are at a higher energy level than the products.
(D) The reaction is exothermic because the reactants are at a lower energy level than the products.
(E) The reaction is endothermic because the reactants are at the same energy level as the products.
|
[
"\\boxed{C}"
] |
9da62e77-c8dd-42bb-be95-df1c3f0bfeec
|
[
"images/9da62e77-c8dd-42bb-be95-df1c3f0bfeec-0.png"
] | null | 910
|
The formal charge on carbon in the molecule below is.
A) 0
B) +1
C) -1
D) +3
E) +2
|
[
"\\boxed{A}"
] |
fe6efa2d-8b14-4d44-b076-4b9bbb93e004
|
[
"images/fe6efa2d-8b14-4d44-b076-4b9bbb93e004-0.png"
] | null | 911
|
Based on the figure above, the boiling point of ethyl alcohol under an external pressure of 0.0724 atm is
________eC.
A) 60
B) 20
C) 70
D) 80
E) 40
|
[
"\\boxed{B}"
] |
c7fe71cf-d145-42dd-9369-1a370172f06a
|
[
"images/c7fe71cf-d145-42dd-9369-1a370172f06a-0.png"
] | null | 912
|
The graph shown below depicts the relationship between concentration and time for the following chemical
reaction. The slope of this line is equal to __________.
A) -k
B) -1/k
C) k
D) ln[A]o
E) 1/k
|
[
"\\boxed{A}"
] |
090b8d5f-8df2-440e-934b-f2a8964dad6d
|
[
"images/090b8d5f-8df2-440e-934b-f2a8964dad6d-0.png"
] | null | 913
|
Which energy difference in the energy profile below corresponds to the activation energy for the forward
reaction?
A) x
B) y
C) x + y
D) y - x
E) x - y
|
[
"\\boxed{A}"
] |
43d32340-d18d-4da8-9c63-36175a684c23
|
[
"images/43d32340-d18d-4da8-9c63-36175a684c23-0.png"
] | null | 914
|
Consider the following table of $K_{sp}$ values. The solubility of manganese hydroxide ($Mn(OH)_2$) is 2.2e-5 M. What is the Ksp of $Mn(OH)_2$?
A) 2.1e-14
B) 4.3e-14
C) 1.1e-14
D) 2.2e-5
E) 4.8e-10
|
[
"\\boxed{B}"
] |
d291f4b1-fab8-462a-adf2-c3d386ef8c4d
|
[
"images/d291f4b1-fab8-462a-adf2-c3d386ef8c4d-0.png"
] | null | 915
|
The data below concerns the general animal body plan of five organisms
The two most closely related organisms are
A. sea anemone and hagfish
B. eel and salamander
C. hagfish and eel
D. sea anemone and salamande
|
[
"\\boxed{B}"
] |
b72c87ff-cc12-4092-8de3-65f148c401a5
|
[
"images/b72c87ff-cc12-4092-8de3-65f148c401a5-0.jpg"
] | null | 916
|
In the following cladogram, a common ancestor (*) and species derived from it are illustrated. How many species have four or more common ancestors with Iguanodon?
A. 1
B. 2
C. 4
D. 6
|
[
"\\boxed{D}"
] |
bc7000a9-7c70-4e8c-bd6e-e517e6eff893
|
[
"images/bc7000a9-7c70-4e8c-bd6e-e517e6eff893-0.jpg"
] | null | 917
|
A population of goldfish in a large, isolated pond were studied in 1958 and again in 2008. The fishes' pigment level varied from pale white-orange fish to dark brown-orange fish. The color of each of the fish was recorded in the figure below.Which addition to the pond did NOT likely contribute to the change between 1958 and 2008?
A. A poisonous fish with a medium orange pigment
B. Runoff from fields that makes the water dark and murky
C. A light-orange water grass that grows in the pond
D. Predatory birds that can easily see medium-orange pigment
|
[
"\\boxed{A}"
] |
853eb22a-2aaa-4cb8-90ff-dc621a0a8be3
|
[
"images/853eb22a-2aaa-4cb8-90ff-dc621a0a8be3-0.jpg"
] | null | 918
|
A population of goldfish in a large, isolated pond were studied in 1958 and again in 2008. The fishes' pigment level varied from pale white-orange fish to dark brown-orange fish. The color of each of the fish was recorded in the figure below.Which of the following theories is supported by the evidence?
A. The pigment trait in fish demonstrates incomplete dominance.
B. The pigment trait in fish demonstrates classical dominance.
C. The pigment trait in fish demonstrates codominance.
D. None of the above
|
[
"\\boxed{D}"
] |
b8775733-4711-4157-b997-85fae9062878
|
[
"images/b8775733-4711-4157-b997-85fae9062878-0.jpg"
] | null | 919
|
A group of Daphnia, small crustaceans known as water fleas, was placed in one of three culture jars of different sizes to determine their reproductive rate. There were 100 females in the jar. The graph below shows the average number of offspring produced per female each day in each jar of pond water.The data in the figure above would best support which conclusion?
A. If you decreased the number of females, the container would have to remain constant.
B. The number of offspring produced scales proportionally with the container's size.
C. The number of offspring produced increases with time.
D. Daphnia prefer high-density conditions to have the most efficient reproductive rate.
|
[
"\\boxed{B}"
] |
ed6efc50-8823-421f-a510-5fc704a35855
|
[
"images/ed6efc50-8823-421f-a510-5fc704a35855-0.jpg"
] | null | 920
|
An experiment was performed to assess the growth of two species of plants when they were grown in different pHs, given different volumes of water, and watered at different times of day over 6 weeks. Two plants were grown of each species and the average heights (in cm) are shown in the table.Which pH and volume were likely used for the watering time experiment?
A. pH 4 and 40 mL
B. pH 7 and 40 mL
C. pH 4 and 80 mL
D. pH 7 and 80 mL
|
[
"\\boxed{D}"
] |
54855d83-b824-49da-bbfc-19b98d2fd7bd
|
[
"images/54855d83-b824-49da-bbfc-19b98d2fd7bd-0.jpg"
] | null | 921
|
Note: + indicates a feature present in an organism.
Questions below refer to the data below concerning the general animal body plan of four organisms.The two most closely related organisms are
A. sea anemone and hagfish
B. eel and salamander
C. hagfish and eel
D. sea anemone and salamander
|
[
"\\boxed{B}"
] |
bb24d8a6-8458-485a-bcf3-a3e51a2f305b
|
[
"images/bb24d8a6-8458-485a-bcf3-a3e51a2f305b-0.jpg"
] | null | 922
|
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in the table below. The scientists used this data to create the phylogenetic tree shown below with positions labeled I, II, III, and IV as well as O, P, Q, R, and S.Which 2 species would you expect to have the most shared derived characters?
A. Snippeiq and Sqellert
B. Gerdellen and Sqellert
C. Snorflak and Gerdellen
D. Snorflak and Fixxels
|
[
"\\boxed{D}"
] |
e4daa6e7-d9ea-491a-a29c-4c94f57ad9dd
|
[
"images/e4daa6e7-d9ea-491a-a29c-4c94f57ad9dd-0.jpg"
] | null | 923
|
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in the table below. The scientists used this data to create the phylogenetic tree shown below with positions labeled I, II, III, and IV as well as O, P, Q, R, and S.Which species is the out-group?
A. Snippeiq
B. Fixxels
C. Snorflak
D. Sqellert
|
[
"\\boxed{A}"
] |
e8984495-f1a3-4051-aeef-3ba595f92644
|
[
"images/e8984495-f1a3-4051-aeef-3ba595f92644-0.jpg"
] | null | 924
|
Questions below refer to the following figures which show 5 species of insects that were discovered on a previously unknown island and were named as shown in the table. Proteomic analysis was performed on a highly conserved protein in the insects and the number of amino acid differences was calculated and included in the table below. The scientists used this data to create the phylogenetic tree shown below with positions labeled I, II, III, and IV as well as O, P, Q, R, and S.Based on the data, which is the LEAST possible location for Gerdellen to be placed?
A. Position O
B. Position P
C. Position R
D. Position S
|
[
"\\boxed{D}"
] |
61b35f66-6eab-4f54-ab96-c0b97792cfd2
|
[
"images/61b35f66-6eab-4f54-ab96-c0b97792cfd2-0.jpg"
] | null | 925
|
The cell cycle is a series of events in the life of a dividing eukaryotic cell. It consists of four stages: G1, S, G2, and M. The duration of the cell cycle varies from one species to another and from one cell type to another. The G1 phase varies the most. For example, embryonic cells can pass through the G1 phase so quickly that it hardly exists, whereas neurons are arrested in the cell cycle and do not divide.If the cell cycle fails to progress, which of the following is NOT a possible explanation?
A. There are inadequate phosphate groups available for the cyclin dependent kinase.
B. A tumor suppressor protein has signaled for apoptosis.
C. A cyclin is unable to release from its cyclin dependent kinase.
D. An inhibitor of a cyclin gene has been highly expressed.
|
[
"\\boxed{C}"
] |
bd4ac422-b606-44dc-9cb7-a228f0558b02
|
[
"images/bd4ac422-b606-44dc-9cb7-a228f0558b02-0.jpg"
] | null | 926
|
It is difficult to determine exactly how life began. Answer the following questions as if the following data had been collected billions of years ago.Which best describes the origin of life according to the data?
A. Life required an environment with atmospheric oxygen and any type of nucleic acids.
B. Life required an environment with atmospheric carbon dioxide, but not atmospheric oxygen.
C. Life required an environment with self-replicating nucleic acids that can take on many shapes.
D. Life required an environment with nucleic acids and proteins, but not atmospheric oxygen.
|
[
"\\boxed{C}"
] |
313c82af-fd34-444c-a563-5bfbdd9e1458
|
[
"images/313c82af-fd34-444c-a563-5bfbdd9e1458-0.jpg"
] | null | 927
|
The following are important pieces of replication and transcription machinery:What might have occurred to produce the following situation?
A. Stalled DNA replication
B. Initiation of transcription
C. Repression of transcription
D. Crossing-over in meiosis
|
[
"\\boxed{C}"
] |
c4c092c7-a89f-47f2-8545-5c3091d02a80
|
[
"images/c4c092c7-a89f-47f2-8545-5c3091d02a80-0.jpg"
] | null | 928
|
The graph below shows two growth curves for bacterial cultures, A and B.Which of the following represents the carrying capacity for culture B?
A. 10
B. 50
C. 100,000
D. 1,000,000
|
[
"\\boxed{C}"
] |
64304906-6429-46b7-9b0b-752d0bbf47de
|
[
"images/64304906-6429-46b7-9b0b-752d0bbf47de-0.jpg"
] | null | 929
|
The Loop of Henle is a structure within each of the million nephrons within a kidney. As shown in the figure, the two sides have different permeabilities, and there is differential movement across each membrane. The Loop acts as a counter-current multiplier that makes the medulla of the kidney very osmotic. The longer the loop, the higher and more powerful the osmolarity gradient that is created. The gradient is required for the reclamation of water from the urine collecting duct. On the right side of the figure is the urine collecting duct. If the body needs to retain water, anti-diuretic hormone makes this region permeable to water via the introduction of aquaporins, and the osmotic pull of the medulla reclaims the water, out of the collecting duct, which makes the urine more concentrated.Which of the following statements correctly describes the state of things near the top of the descending limb?
A. The fluid within the descending limb is hypotonic to fluid in the space surrounding the tubule.
B. The blood within the vasa recta is hypotonic to the filtrate within the descending limb.
C. The fluid in the area surrounding the tubule is hypertonic to the blood in the vasa recta.
D. The water in the area surrounding the tubule has a higher water potential than the water in the descending tubule.
|
[
"\\boxed{A}"
] |
a9b25e01-95b9-4ce4-a767-1b7b5698433b
|
[
"images/a9b25e01-95b9-4ce4-a767-1b7b5698433b-0.jpg"
] | null | 930
|
The affinity of hemoglobin for oxygen is reduced by many factors, including low pH and high CO2. The graph below shows the different dissociation curves that maternal (normal) hemoglobin and fetal hemoglobin have.Which of the following processes would likely shift the normal dissociation curve to the right?
A. Photosynthesis
B. Respiration
C. Fermentation
D. Mitosis
|
[
"\\boxed{C}"
] |
ab6741c9-ce1c-45cb-a02e-3243ab505f2b
|
[
"images/ab6741c9-ce1c-45cb-a02e-3243ab505f2b-0.jpg"
] | null | 931
|
The enzymatic catalysis of a reaction essential in the production of dog saliva is mediated by the protein ARKKKK60491. ARKKKK60491 is a homodimer, with each subunit being 337 amino acids. Figure 1, below, indicates a modular structure of the homodimer. Three positions are indicated on the model. Position A is the active site. Position B is a region known to have a large number of nonpolar residues. Position C is known to have a large number of charged residues.Which of the following is Position B most likely to assist the protein with?
A. Stabilization of the substrate into the transition state during catalysis
B. Transportation of catalyzed cargo from the nucleus to the mitochondria
C. Creation of a homodimer through catalysis of homodimerization
D. Attachment to the membrane by embedding into the phospholipid bilayer
|
[
"\\boxed{D}"
] |
c7e6464f-c781-4765-8613-20a51c069231
|
[
"images/c7e6464f-c781-4765-8613-20a51c069231-0.jpg"
] | null | 932
|
A chain of three small islands was found to be the home to a small species of mouse. The angle of jaw opening was found to vary significantly. The average size angle of the maximal jaw opening found in mice at 10 locations on the three small islands is shown in Figure 1, below.Skeletons have been found that indicate that mice with jaw angles less than 30 degrees were once found on Island B. Which explanation best accounts for this?
A. A small jaw angle hinders the survival of mice on Island B.
B. A large jaw angle hinders the survival of mice on Island A.
C. A small jaw angle encourages the survival of mice on Island C.
D. A large jaw angle encourages the survival of mice on Island A.
|
[
"\\boxed{A}"
] |
6654610b-9e23-48d1-86a2-25be13c78715
|
[
"images/6654610b-9e23-48d1-86a2-25be13c78715-0.jpg"
] | null | 933
|
A gene responsible for production of hair pigment in dogs is called Fursilla (frsl). A map of the Fursilla locus is shown in Figure 1, below. When expressed, it results in darkly pigmented dog fur. When unexpressed, the hair is devoid of pigmentation and appears pure white. Expression of Fursilla (frsl) depends on the binding/lack of binding of several proteins: Nefur (NEFR), Lesfur (LSFR), and Dirkfur (DRKFR). Figure 2 shows the relative levels of frsl transcript as measured via RT-qPCR when each protein is overexpressed or unexpressed in the cell.Based on the data, which of the following most likely describes how the binding of proteins affects the production of Fursilla transcript?
A. Because Fursilla transcript levels change when certain proteins are overexpressed or unexpressed in the cell, Fursilla must interfere with the other proteins.
B. Because Fursilla transcript levels stay the same whether NEFR is overexpressed or unexpressed, NEFR must bind inhibit the production of Fursilla transcript.
C. Because Fursilla transcript levels decrease when LSFR is unexpressed in the cell, LSFR must compete for the binding site or RNA polymerase.
D. Because Fursilla transcript levels increase when DRKFR is unexpressed in the cell, DRKFR must compete for the binding site of RNA polymerase.
|
[
"\\boxed{D}"
] |
4fb7c6fe-3e85-4c12-9405-6c768efd7fc8
|
[
"images/4fb7c6fe-3e85-4c12-9405-6c768efd7fc8-0.jpg"
] | null | 934
|
The active site of the enzyme Ritzolinine (RZN45) contains three positively charged lysine residues. When ascorbic acid is present, binding of JB-76, the substrate of RZN45, decreases. The reaction rate is affected by the presence of ascorbic acid as shown in the figure below. It is thought that a daily supplement of Vitamin C might aid those suffering from Ritzolierre's Disease, which is caused by elevated levels of RZN45.If Figure 1 were to include additional data for higher concentrations of JB-76, how would the reaction rate change?
A. The reaction rate would be lower than any reaction rate shown in Figure 1.
B. The reaction rate would be higher than any reaction rate shown in Figure 1.
C. The reaction rate would be equal to the highest reaction rate shown in Figure 1.
D. The reaction rate would increase gradually for each concentration of JB-76 added.
|
[
"\\boxed{C}"
] |
fdbbd11d-ca42-47ef-b998-9e1ebd12b299
|
[
"images/fdbbd11d-ca42-47ef-b998-9e1ebd12b299-0.jpg"
] | null | 935
|
The active site of the enzyme Ritzolinine (RZN45) contains three positively charged lysine residues. When ascorbic acid is present, binding of JB-76, the substrate of RZN45, decreases. The reaction rate is affected by the presence of ascorbic acid as shown in the figure below. It is thought that a daily supplement of Vitamin C might aid those suffering from Ritzolierre's Disease, which is caused by elevated levels of RZN45.Which is the best explanation for the differing effects on reaction rate caused by ascorbic acid at low and high concentrations of JB-76?
A. At high concentrations of JB-76, there are fewer free active sites for the ascorbic acid to bind to.
B. At low concentrations of JB-76, there are fewer free allosteric sites for the RZN45 to bind to.
C. At high concentrations of JB-76, there are more free allosteric sites for the ascorbic acid to bind to.
D. At low concentrations of JB-76, there are more free active sites for the RZN45 to bind to.
|
[
"\\boxed{A}"
] |
63b26b53-5fb7-451e-8f42-9a2c1816a352
|
[
"images/63b26b53-5fb7-451e-8f42-9a2c1816a352-0.jpg"
] | null | 936
|
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