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HESI A2 · Biology · HESI A2 Biology 2024

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

How should a researcher test the hypothesis that practicing yoga reduces blood pressure?

A. Record the blood pressure of one male and one female participant before and after participating in a yoga class.

B. Divide 30 female participants into two groups with similar average blood pressure; test each participant's blood pressure after participating in a yoga class.

C. Divide 30 female participants into two groups with similar average blood pressure; have one group watch television for an hour while the other takes a yoga class, record each participant's blood pressure after the hour. Repeat daily for two weeks.

D. Start with 15 men and 15 women; have the men watch television for an hour while the women take a yoga class, record each participant's blood pressure after the hour. Reverse, having the men take a yoga class while the women watch television.

Expert Explanatory Rationale

Correct Answer: Divide 30 female participants into two groups with similar average blood pressure; test each participant's blood pressure after participating in a yoga class.

Question 2 of 5

What happens to glucose during glycolysis?

A. Its energy is entirely lost.

B. It splits into molecules of pyruvic acid.

C. It is stored in NADH.

D. It joins with molecules of citric acid.

Expert Explanatory Rationale

Correct Answer: It splits into molecules of pyruvic acid.

Question 3 of 5

Dogs are part of a larger animal group, the Carnivora. What classification is this?

A. Kingdom

B. Class

C. Order

D. Genus

Expert Explanatory Rationale

Correct Answer: Order

Question 4 of 5

Which names a final step in protein synthesis?

A. DNA unzips.

B. Amino acids bond.

C. Transfer RNA bonds to messenger RNA.

D. Messenger RNA moves to ribosomes.

Expert Explanatory Rationale

Correct Answer: Amino acids bond.

Question 5 of 5

In an example of a male with hemophilia and a female carrier, what ratio of the offspring are predicted neither to carry nor to manifest the disease?

A. 0 females : 1 male

B. 1 female : 1 male

C. 1 female : 0 males

D. 2 females : 1 male

Expert Explanatory Rationale

Correct Answer: 2 females : 1 male

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