HESI A2 Biology Exam 2024 - 25 Practice Questions and Answers

Last Updated on June 17, 2024

HESI A2 Biology Exam 2024 – 25 Practice Questions and Answers online Quiz: Prepare to excel on the HESI A2 Biology exam with our comprehensive practice test featuring 25 carefully curated questions and answers. This practice test covers essential biology topics, including protein synthesis, cellular respiration, genetics, anatomy, and more. Each question is designed to mimic the style and difficulty of the HESI A2 exam, providing a realistic and practical study experience.

Whether a nursing student or a prospective healthcare professional, our HESI A2 Biology practice test will help you build confidence and improve your test-taking skills. With detailed explanations for each answer, you’ll better understand the biological concepts you need to know. Boost your preparation and increase your chances of achieving a high score on the HESI A2 Biology exam. Start practicing now and take a significant step towards your healthcare career goals!

HESI A2 Biology 25 Practice Questions and Answers

HESI A2 Biology Practice Test

HESI A2 Biology Practice Test
25 items | Suggested time: 25 minutes
Free Test No Registration is Required

1 / 25

Which of these molecules contains glucose?

(A) Proteins

(B) Lipids

(D) Carbohydrates

2 / 25

Why are bacteria and blue-green algae often classified together?

(A) Both are gymnosperms.

(B) Both are prokaryotes.

(D) Both are pathogens.

3 / 25

Why do we perceive chlorophyll as green?

(A) It absorbs yellow and blue light.

(B) It primarily absorbs green light.

(D) It primarily absorbs red light.

4 / 25

Which is not a step in the water cycle?

(A) Condensation

(B) Transpiration

(D) Absorption

5 / 25

How should a researcher test the hypothesis that eating chocolate leads to acne in teenagers?

(A) Take 100 teenagers and feed each one a different amount of chocolate daily for 60 days; then test for acne.

(B) Take 100 teenagers and feed 50 two bars of chocolate daily for 60 days while the other 50 eat no chocolate; then test for acne.

(C) Take 1 teenager and feed him or her two bars of chocolate for 30 days and no chocolate for 30 days; then test for acne.

(D) Take 100 teenagers and feed them no chocolate for 30 days and two bars of chocolate apiece for 30 days; then test for acne.

6 / 25

Which statement regarding energy content is true?

(A) Decomposers > secondary consumers

(B) Primary consumers > producers

(D) Secondary consumers > primary consumers

7 / 25

Three students measured the mass of a product of combustion. They recorded measurements of 5.14 g, 5.16 g, and 5.17 g. If the known mass of the product is 5.30 g, how would you describe the students’ measurements?

(A) Accurate

(B) Precise

(D) Neither accurate nor precise

8 / 25

What is represented by this formula: 6CO2 + 6H2O → C6H12O6 + 6O2?

(A) Glycolysis

(B) Cellular respiration

(D) Electronic transport

9 / 25

Hemophilia is a sex-linked trait carried on the X chromosome. In an example of a male with hemophilia and a female carrier, what ratio of the offspring is predicted to have the disease?

(A) 0 female : 2 male

(B) 1 female : 0 male

(D) 2 female : 1 male

10 / 25

In a strand of DNA, you would expect to see adenine paired with ___________.

(A) cytosine

(B) uracil

(D) guanine

11 / 25

In which phase of cell division do the chromosomes replicate?

(A) Prophase

(B) Interphase

(D) Telophase

12 / 25

Which organism reproduces via binary fission?

(A) Mushroom

(B) Blue whale

(D) Salmonella

13 / 25

What takes place in a lysosome?

(A) Ribosomes are made.

(B) Food is produced.

(D) Food is digested.

14 / 25

Beeswax is an example of what kind of molecule?

(A) Lipid

(B) Carbohydrate

(D) Nucleic acid

15 / 25

The scientific name for a house cat is Felis catus. This indicates the house cat’s ___________ and ___________.

(A) kingdom; family

(B) order; subspecies

(D) genus; species

16 / 25

What kind of symbiosis exists between a pneumonia bacterium and a human?

(A) Mutualism

(B) Parasitism

(D) Competition

17 / 25

Which part of a plant’s reproductive system is of a different “gender” than the others?

(A) Stamen

(B) Pistil

(D) Style

18 / 25

Physical factors such as temperature and pH can alter enzyme activity because they have an effect on the enzyme’s ___________.

(A) acidity

(B) shape

(D) substrate

19 / 25

What is the purpose of phloem tissue in plant stems?

(A) It conducts water up through the stem.

(B) It conducts the energy of light to leaves.

(D) It conducts carbon dioxide throughout the plant.

20 / 25

A cell is in a solution in which the concentration of solutes is higher inside the cell than outside the cell. What would you expect to happen to the cell?

(A) It will swell and possibly burst.

(B) It will shrivel and shrink.

(D) It will grow a supportive cell wall.

21 / 25

Imagine that two parents both carry the recessive gene for cystic fibrosis. Any homozygous recessive offspring will manifest the disease. What percentage of the offspring is predicted to be carriers but not manifest the disease?

(A) 0%

(B) 25%

(D) 100%

22 / 25

Which statement is untrue?

(A) RNA is single-stranded.

(B) RNA contains uracil.

(D) DNA cannot be altered.

23 / 25

How is mitosis different from meiosis?

(A) Mitosis is the process by which sex cells are formed.

(B) Meiosis creates cells with half the chromosomes of the parent cell.

(D) Spermatogenesis and oogenesis occur via mitosis.

24 / 25

Why is yeast used to make bread rise?

(A) It engages in photosynthesis, which produces oxygen gas.

(B) Carbon dioxide forms while yeast carries out photosynthesis.

(D) Yeast breathes in oxygen and produces carbon dioxide through aerobic respiration.

25 / 25

Which organelle is responsible for protein synthesis?

(A) Mitochondrion

(B) Vacuole

(D) Ribosome

Your score is

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