Free HESI A2 Biology Practice Test

Sharpen your skills with our free HESI A2 Biology practice test. This online exam features challenging questions covering key topics like cells, genetics, anatomy, physiology, and ecosystems—just like the real test. Each question includes a detailed explanation to reinforce your understanding as you go.

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1. Question

Which of the following is a correct description of metaphase during mitosis?

2. Question

Where can ribosomes be found inside of a eukaryotic cell?

3. Question

What is the role of the Golgi apparatus in the eukaryotic cell?

4. Question

Which best describes the bonds between atoms within a water molecule?

5. Question

Which of the following is the MOST inclusive category in the hierarchical organizational system for nomenclature?

6. Question

During which phase of the eukaryotic cell cycle is DNA replicated?

7. Question

Which of the following processes begins with a diploid cell and ends in the formation of diploid cells?

8. Question

Which of the following types of cell results from cell division by meiosis?

9. Question

What are the products of the Krebs cycle?

10. Question

The plasma membrane of a cell is composed of:

11. Question

Which of the following activities does NOT lead to ATP production?

12. Question

Which of the following is an example of a heterozygous genotype?

13. Question

The alternate versions of a single gene are known as:

14. Question

For a trait that shows a simple dominance inheritance pattern, which genotypes will result in the individual having the dominant phenotype?

15. Question

The term that describes a phospholipid having both a hydrophilic end and a hydrophobic end:

16. Question

Which type of large biological molecule is correctly matched with the type of small molecule that composes it?

17. Question

Which process synthesizes mRNA using DNA as the template?

18. Question

Which of the following is a typical base pair seen in double-stranded DNA?

19. Question

If an individual who is homozygous dominant for a given trait is crossed with an individual who is homozygous recessive for the same trait, what percentage of offspring should show the recessive phenotype? Assume a simple dominance inheritance pattern.

20. Question

Which term refers to when one gene influences multiple seemingly unrelated phenotypic traits?

21. Question

Which parts of two complementary nucleotides interact with each other in a double-stranded DNA molecule?

22. Question

Glycolysis is the conversion of ____________ to ____________ .

23. Question

During which step of cellular respiration is NADH oxidized to produce ATP and water?

24. Question

For every glucose molecule that undergoes cellular respiration, approximately how many ATP molecules can be produced?

25. Question

Which cellular structure is the location of protein synthesis in a eukaryotic cell?

Next Practice Test: Chemistry

Glycolysis is the conversion of to .