HESI A2 BIOLOGY QUESTIONS PRACTICE EXAM [QUESTION 1- 200]
AND ANSWERS UPDATED 2026/2027| ORIGINAL PRACTICE
CONTENT|DETAILED RATIONALES EXAM-LEVEL PREPARATION
|INSTANT DOWNLOAD
______________ is a symbiotic relationship in which one organism benefits and the other is not
affected.
A. Mutualism
B. Parasitism
C. Commensalism
D. Competition - --CORRECT ANSWER----C. Commensalisim
72 chromosomes undergo meiosis. How many chromosomes will be in each gamete?
A. 18
B. 36
C. 72
D. 144 - --CORRECT ANSWER----B. 36
A cell division occurs in a human. The resulting cells contain 23 chromosomes. This is a description of
gametes formed by which process?
A. Mitosis
B. Binary fission
C. Meiosis
D. Cytokinesis - --CORRECT ANSWER----C. Meosis
A cell from heart muscle would more than likely contain an usually high proportion of:
A. Lysosomes
B. Mitochondria
C. mRNA
D. Ribosomes - --CORRECT ANSWER----B. Mitochondria
,HESI A2 BIOLOGY QUESTIONS PRACTICE EXAM [QUESTION 1- 200]
AND ANSWERS UPDATED 2026/2027| ORIGINAL PRACTICE
CONTENT|DETAILED RATIONALES EXAM-LEVEL PREPARATION
|INSTANT DOWNLOAD
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
C. It will maintain its current size
D. It will grow a supportive cell wall. - --CORRECT ANSWER----A. It will swell and possibly burst.
A molecule of water is bonded with another molecule of water by what type of bond?
A. Ionic
B. Covalent
C. Hydrogen
D. Molecular - --CORRECT ANSWER----C. Hydrogen
A student was asked to count birds in a given location over a 24 hour period. Which count would make
her data most valid?
A. Count birds at one feeder every 6 hours.
B. Count birds at three feeders at noon and 6 pm.
C. Count birds are one feeder at noon and 6 pm.
D. Count birds at three feeders every 6 hours. - --CORRECT ANSWER----D. Count birds at three feeders
every 6 hours.
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 - --CORRECT ANSWER----A. Hypothesis
, HESI A2 BIOLOGY QUESTIONS PRACTICE EXAM [QUESTION 1- 200]
AND ANSWERS UPDATED 2026/2027| ORIGINAL PRACTICE
CONTENT|DETAILED RATIONALES EXAM-LEVEL PREPARATION
|INSTANT DOWNLOAD
At which phase of meiosis does crossing over occur?
A. Prophase I
B. Prophase II
C. Metaphase I
D. Metaphase II - --CORRECT ANSWER----A. Prophase I
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 - --CORRECT ANSWER----B. Proteins
Because genetics is the study of heredity, many human disorders can be determined by studying a
person's chromosomes or by creating which of the following?
A. Punnet square
B. Pedigree
C. Chromosome model
D. Genetic map - --CORRECT ANSWER----B. Pedigree
Beeswax is an example of what kind of molecule?
A. Lipid
B. Carbohydrate
C. Protein
D. Nucleic acid - --CORRECT ANSWER----A. Lipid
Cells reproduce by different processes, all of which fall into what two categories?
AND ANSWERS UPDATED 2026/2027| ORIGINAL PRACTICE
CONTENT|DETAILED RATIONALES EXAM-LEVEL PREPARATION
|INSTANT DOWNLOAD
______________ is a symbiotic relationship in which one organism benefits and the other is not
affected.
A. Mutualism
B. Parasitism
C. Commensalism
D. Competition - --CORRECT ANSWER----C. Commensalisim
72 chromosomes undergo meiosis. How many chromosomes will be in each gamete?
A. 18
B. 36
C. 72
D. 144 - --CORRECT ANSWER----B. 36
A cell division occurs in a human. The resulting cells contain 23 chromosomes. This is a description of
gametes formed by which process?
A. Mitosis
B. Binary fission
C. Meiosis
D. Cytokinesis - --CORRECT ANSWER----C. Meosis
A cell from heart muscle would more than likely contain an usually high proportion of:
A. Lysosomes
B. Mitochondria
C. mRNA
D. Ribosomes - --CORRECT ANSWER----B. Mitochondria
,HESI A2 BIOLOGY QUESTIONS PRACTICE EXAM [QUESTION 1- 200]
AND ANSWERS UPDATED 2026/2027| ORIGINAL PRACTICE
CONTENT|DETAILED RATIONALES EXAM-LEVEL PREPARATION
|INSTANT DOWNLOAD
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
C. It will maintain its current size
D. It will grow a supportive cell wall. - --CORRECT ANSWER----A. It will swell and possibly burst.
A molecule of water is bonded with another molecule of water by what type of bond?
A. Ionic
B. Covalent
C. Hydrogen
D. Molecular - --CORRECT ANSWER----C. Hydrogen
A student was asked to count birds in a given location over a 24 hour period. Which count would make
her data most valid?
A. Count birds at one feeder every 6 hours.
B. Count birds at three feeders at noon and 6 pm.
C. Count birds are one feeder at noon and 6 pm.
D. Count birds at three feeders every 6 hours. - --CORRECT ANSWER----D. Count birds at three feeders
every 6 hours.
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 - --CORRECT ANSWER----A. Hypothesis
, HESI A2 BIOLOGY QUESTIONS PRACTICE EXAM [QUESTION 1- 200]
AND ANSWERS UPDATED 2026/2027| ORIGINAL PRACTICE
CONTENT|DETAILED RATIONALES EXAM-LEVEL PREPARATION
|INSTANT DOWNLOAD
At which phase of meiosis does crossing over occur?
A. Prophase I
B. Prophase II
C. Metaphase I
D. Metaphase II - --CORRECT ANSWER----A. Prophase I
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 - --CORRECT ANSWER----B. Proteins
Because genetics is the study of heredity, many human disorders can be determined by studying a
person's chromosomes or by creating which of the following?
A. Punnet square
B. Pedigree
C. Chromosome model
D. Genetic map - --CORRECT ANSWER----B. Pedigree
Beeswax is an example of what kind of molecule?
A. Lipid
B. Carbohydrate
C. Protein
D. Nucleic acid - --CORRECT ANSWER----A. Lipid
Cells reproduce by different processes, all of which fall into what two categories?
