Question 1

Which of the following best describes the main function of ATP synthase during cellular respiration?

Accepted Answer

It synthesizes ATP from ADP and inorganic phosphate using the energy from a proton gradient.

Question 2

A scientist observes a cell with a single, circular DNA molecule, no membrane-bound organelles, and a cell wall. To which domain does this cell most likely belong?

Accepted Answer

Domain Archaea

Question 3

Which of the following scenarios best illustrates incomplete dominance?

Accepted Answer

A cross between a red-flowered and a white-flowered plant produces all pink-flowered offspring.

Question 4

Which of the following best explains why cells are typically small in size?

Accepted Answer

Smaller cells have a higher surface area-to-volume ratio, allowing for more efficient exchange of materials.

Question 5

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 6

A woman with genotype $$X^N X^n ($$where $$N is $$normal vision and $$n is $$color blindness) and a man with genotype $$X^n Y$$ have a child. What is the probability that their son will be color blind?

Accepted Answer

$$0.50$$

Question 7

Which of the following is a correct sequence of events in the process of protein synthesis?

Accepted Answer

Transcription in the nucleus, translation in the cytoplasm, protein folding in the Golgi apparatus

Question 8

Which of the following best describes the bottleneck effect in a population?

Accepted Answer

A sudden reduction in population size due to a natural disaster, resulting in a loss of genetic variation.

Question 9

Which of the following equations correctly represents the calculation for population doubling time using the Rule of 72?

Accepted Answer

$$Doubling\ Time = \frac{72}{Growth\ Rate\ (\%)}$$

Question 10

Which of the following is NOT a function of peroxisomes in eukaryotic cells?

Accepted Answer

Synthesizing proteins

Question 11

A population of birds is separated by a newly formed river, and over generations, the two groups develop distinct traits. Which evolutionary mechanism is most directly responsible for this divergence?

Accepted Answer

Natural selection

Question 12

Which of the following best describes the role of histones in the cell?

Accepted Answer

They are proteins that package and organize DNA into structural units called nucleosomes.

Question 13

Which of the following is an example of co-dominance?

Accepted Answer

A person with type AB blood expresses both A and B antigens.

Question 14

Which of the following best describes the function of tight junction proteins in epithelial tissue?

Accepted Answer

They prevent the passage of substances between adjacent cells, creating a barrier.

Question 15

Which of the following is a correct description of the difference between diploid and haploid cells?

Accepted Answer

Diploid cells contain two sets of chromosomes, while haploid cells contain one set.

Question 16

Which of the following best explains why non-disjunction during meiosis can lead to genetic disorders such as Turner Syndrome?

Accepted Answer

Non-disjunction results in gametes with abnormal numbers of chromosomes, leading to disorders when fertilization occurs.

Question 17

Which of the following best describes the process of hydrolysis?

Accepted Answer

The breakdown of polymers into monomers by the addition of water.

Question 18

Which of the following is a correct sequence of the steps in the citric acid cycle?

Accepted Answer

Acetyl-CoA combines with oxaloacetate to form citrate, which is then oxidized, producing NADH, FADH$$_2$$, and CO$$_2.$$

Question 19

A population of rabbits has a biotic potential of 0.5 per month and an initial population size of 100. Assuming no environmental resistance, what will the population size be after 2 months? Use the exponential growth equation: $$N_t = N_0$ e$$^{rt}$$, where N_0$ = 100$$, $$r = 0.5$$, $$t = 2.$$

Accepted Answer

$$N_t = 100 	imes e$$^{1}$$ \approx 271.8$$

Question 20

Which of the following best describes the difference between an ecosystem and a community?

Accepted Answer

An ecosystem includes all living organisms and their physical environment, while a community includes only the living organisms.

Comprehensive General Biology Final Exam Review Guide

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