HESI A2 Biology Test Exam Questions and Answers 2025 Guaranteed Pass
1. Why is polarity the most important characteristic of water?: The results of the polarity are
hydrogen bonding, a high specific heat value, and its versatile solvent properties.
2. Athletes are often concerned with the question of what they need in their diets to
increase muscle mass and strength. What biologic molecule would you recommend
that would accomplish this?
A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids: B. Proteins
3. Which organelle would you expect to be present in a cell responsible for detoxifying
multiple molecules?
A. Rough ER
B. Smooth ER
C. Lysosome
D. Golgi apparatus: B. Smooth ER
4. A cell from heart muscle would more than likely contain an usually high proportion
of:
A. Lysosomes
B. Mitochondria
C. mRNA
D. Ribosomes: B. Mitochondria
5. Which part of cell respiration produces the greatest amount of ATP?
,A. ETC
B. Glycolysis
C. Krebs cycle
D. Fermentation: A. ETC
6. When plants do not receive enough water their photosynthetic rated drops. This is
because:
A. Water is a raw material for the light reactions in photosynthesis.
B. Carbon dioxide is not available.
C. Water provides the carbon atoms used to make sugar.
D. Not enough oxygen is produced to keep fermentation running: A. Water is a raw material
for the light reactions in photosynthesis
7. Which of the following statements is true about the Krebs cycle and the Calvin
cycle?
A. Both result in a net production of ATP and NADH
B. Both require a net input of ATP
C. Both result in release of oxygen
,D. Both use light to initiate the process.: A. Both result in a net production of ATP and NADH
8. Why is it important for cells to undergo mitosis?: Mitosis produces cells for growth and
repair of body tissue.
9. 72 chromosomes undergo meiosis. How many chromosomes will be in each gamete?
A. 18
B. 36
C. 72
D. 144: B. 36
10. Which of the following shows how information is transformed to make a protein?
A. DNA-RNA-protein
B. Gene-chromosome-protein
C. ATP-amino acid-protein
D. RNA-DNA-protein: A. DNA-RNA-protein
11. In the hierarchic system of classification, which of the following is least inclusive?
A. Kingdom
B. Class
C. Genus
D. Species: D. Species
12. After observing an event, you develop an explanation. This statement is referred to
as which of the following?
A. Hypothesis
B. Experiment
C. Conclusion
D. Theory: A. Hypothesis
, 13. A molecule of water is bonded with another molecule of water by what type of bond?
A. Ionic
B. Covalent
C. Hydrogen
D. Molecular: C. Hydrogen
14. Which of the following is a benefit of the intermolecular hydrogen bonding of water?
(Select all that apply)
A. Water has a relatively high specific heat value.
B. Water has strong cohesive and adhesive properties.
C. Polarity of water allows it to act as a versatile solvent.
1. Why is polarity the most important characteristic of water?: The results of the polarity are
hydrogen bonding, a high specific heat value, and its versatile solvent properties.
2. Athletes are often concerned with the question of what they need in their diets to
increase muscle mass and strength. What biologic molecule would you recommend
that would accomplish this?
A. Carbohydrates
B. Proteins
C. Lipids
D. Nucleic acids: B. Proteins
3. Which organelle would you expect to be present in a cell responsible for detoxifying
multiple molecules?
A. Rough ER
B. Smooth ER
C. Lysosome
D. Golgi apparatus: B. Smooth ER
4. A cell from heart muscle would more than likely contain an usually high proportion
of:
A. Lysosomes
B. Mitochondria
C. mRNA
D. Ribosomes: B. Mitochondria
5. Which part of cell respiration produces the greatest amount of ATP?
,A. ETC
B. Glycolysis
C. Krebs cycle
D. Fermentation: A. ETC
6. When plants do not receive enough water their photosynthetic rated drops. This is
because:
A. Water is a raw material for the light reactions in photosynthesis.
B. Carbon dioxide is not available.
C. Water provides the carbon atoms used to make sugar.
D. Not enough oxygen is produced to keep fermentation running: A. Water is a raw material
for the light reactions in photosynthesis
7. Which of the following statements is true about the Krebs cycle and the Calvin
cycle?
A. Both result in a net production of ATP and NADH
B. Both require a net input of ATP
C. Both result in release of oxygen
,D. Both use light to initiate the process.: A. Both result in a net production of ATP and NADH
8. Why is it important for cells to undergo mitosis?: Mitosis produces cells for growth and
repair of body tissue.
9. 72 chromosomes undergo meiosis. How many chromosomes will be in each gamete?
A. 18
B. 36
C. 72
D. 144: B. 36
10. Which of the following shows how information is transformed to make a protein?
A. DNA-RNA-protein
B. Gene-chromosome-protein
C. ATP-amino acid-protein
D. RNA-DNA-protein: A. DNA-RNA-protein
11. In the hierarchic system of classification, which of the following is least inclusive?
A. Kingdom
B. Class
C. Genus
D. Species: D. Species
12. After observing an event, you develop an explanation. This statement is referred to
as which of the following?
A. Hypothesis
B. Experiment
C. Conclusion
D. Theory: A. Hypothesis
, 13. A molecule of water is bonded with another molecule of water by what type of bond?
A. Ionic
B. Covalent
C. Hydrogen
D. Molecular: C. Hydrogen
14. Which of the following is a benefit of the intermolecular hydrogen bonding of water?
(Select all that apply)
A. Water has a relatively high specific heat value.
B. Water has strong cohesive and adhesive properties.
C. Polarity of water allows it to act as a versatile solvent.
