HESI A2 Biology Exam Questions with
Verified Answers
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. - ANSWER-A. Both result in a net production
of ATP and NADH
Why is it important for cells to undergo mitosis? - ANSWER-Mitosis produces cells
for growth and repair of body tissue.
72 chromosomes undergo meiosis. How many chromosomes will be in each
gamete?
A. 18
B. 36
C. 72
D. 144 - ANSWER-B. 36
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 - ANSWER-A. DNA-RNA-protein
In the hierarchic system of classification, which of the following is least inclusive?
A. Kingdom
B. Class
C. Genus
D. Species - ANSWER-D. Species
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 - ANSWER-A. Hypothesis
A molecule of water is bonded with another molecule of water by what type of bond?
A. Ionic
B. Covalent
C. Hydrogen
D. Molecular - ANSWER-C. Hydrogen
,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.
D. Water moves from higher to lower concentrations - ANSWER-A. Water has a high
specific heat
B. Water has strong cohesive and adhesive properties
C. Polarity of water allows it to act as a versatile solvent
Of all the molecules that are significant to biology, which of the following are
considered the most important?
A. Carbohydrates, lipids, protein, and nucleic acids
B. Carbohydrates, lipids, protein, and calcium
C. Carbohydrates, lipids, protein, and sulfur
D. Carbohydrates, lipids, protein, and iron - ANSWER-A. Carbohydrates, lipids,
protein, and nucleic acids
Lipids are better known as fats, but what are they specifically? (Select all that apply.)
A. Fatty acids
B. Phospholipids
C. Ketones
D. Steroids - ANSWER-A. Fatty acids
B. Phospholipids
D. Steroids
What are the two categories of fatty acids?
A. Trans fat and saturated fat
B. Trans fat and unsaturated fats
C. Saturated fats and unsaturated fats
D. Saturated fats and polyunsaturated fats - ANSWER-C. Saturated fats and
unsaturated fats
How do phospholipids function in cells?
A. They are integral components of the nuclear membrane.
B. They are integral components of the cytoplasmic skeleton.
C. They are integral components of the mitochondrial membranes.
D. They are integral components of the plasma membrane. - ANSWER-D. They are
integral components of the plasma membrane.
Which of the biologic molecules are considered the most significant contributor to
cellular function?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids - ANSWER-C. Proteins
Proteins are polymers of which of the following?
A. Monosaccharides
B. Amino acids
, C. Fatty acids
D. Nucleotides - ANSWER-B. Amino acids
Which of the following proteins catalyze different reactions or processes?
A. Keratin
B. Hormone
C. Enzyme
D. Collagen - ANSWER-C. Enzyme
Which of the biologic molecules are components of the molecules of inheritance?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids - ANSWER-D. Nucleic acids
What is the sum of all chemical reactions that occur in an organism?
A. Catalysis
B. Metabolism
C. Catabolism
D. Anabolism - ANSWER-B. Metabolism
In a cell, reactions take place in a series of steps called:
A. Metabolic pathways
B. Chemical bonding
C. Synthesis
D. Hydrolysis - ANSWER-A. Metabolic pathways
What is the most fundamental unit of biology?
A. Atom
B. Cell
C. Tissue
D. Organ - ANSWER-B. Cell
Which type of cell contains no defined nucleus?
A. Prokaryotic cell
B. Eukaryotic cell
C. Animal cell
D. Protest cell - ANSWER-A. Prokaryotic cell
What is the primary purpose of flagella on the surface of cells?
A. Movement of the cell
B. Removal of cellular waste
C. Replication of chromosomes
D. Production of energy - ANSWER-A. Movement of the cell
Which cell organelle functions to transport materials from the endoplasmic reticulum
throughout the cell?
A. Ribosome
B. Golgi apparatus
C. Lysosome
Verified Answers
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. - ANSWER-A. Both result in a net production
of ATP and NADH
Why is it important for cells to undergo mitosis? - ANSWER-Mitosis produces cells
for growth and repair of body tissue.
72 chromosomes undergo meiosis. How many chromosomes will be in each
gamete?
A. 18
B. 36
C. 72
D. 144 - ANSWER-B. 36
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 - ANSWER-A. DNA-RNA-protein
In the hierarchic system of classification, which of the following is least inclusive?
A. Kingdom
B. Class
C. Genus
D. Species - ANSWER-D. Species
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 - ANSWER-A. Hypothesis
A molecule of water is bonded with another molecule of water by what type of bond?
A. Ionic
B. Covalent
C. Hydrogen
D. Molecular - ANSWER-C. Hydrogen
,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.
D. Water moves from higher to lower concentrations - ANSWER-A. Water has a high
specific heat
B. Water has strong cohesive and adhesive properties
C. Polarity of water allows it to act as a versatile solvent
Of all the molecules that are significant to biology, which of the following are
considered the most important?
A. Carbohydrates, lipids, protein, and nucleic acids
B. Carbohydrates, lipids, protein, and calcium
C. Carbohydrates, lipids, protein, and sulfur
D. Carbohydrates, lipids, protein, and iron - ANSWER-A. Carbohydrates, lipids,
protein, and nucleic acids
Lipids are better known as fats, but what are they specifically? (Select all that apply.)
A. Fatty acids
B. Phospholipids
C. Ketones
D. Steroids - ANSWER-A. Fatty acids
B. Phospholipids
D. Steroids
What are the two categories of fatty acids?
A. Trans fat and saturated fat
B. Trans fat and unsaturated fats
C. Saturated fats and unsaturated fats
D. Saturated fats and polyunsaturated fats - ANSWER-C. Saturated fats and
unsaturated fats
How do phospholipids function in cells?
A. They are integral components of the nuclear membrane.
B. They are integral components of the cytoplasmic skeleton.
C. They are integral components of the mitochondrial membranes.
D. They are integral components of the plasma membrane. - ANSWER-D. They are
integral components of the plasma membrane.
Which of the biologic molecules are considered the most significant contributor to
cellular function?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids - ANSWER-C. Proteins
Proteins are polymers of which of the following?
A. Monosaccharides
B. Amino acids
, C. Fatty acids
D. Nucleotides - ANSWER-B. Amino acids
Which of the following proteins catalyze different reactions or processes?
A. Keratin
B. Hormone
C. Enzyme
D. Collagen - ANSWER-C. Enzyme
Which of the biologic molecules are components of the molecules of inheritance?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids - ANSWER-D. Nucleic acids
What is the sum of all chemical reactions that occur in an organism?
A. Catalysis
B. Metabolism
C. Catabolism
D. Anabolism - ANSWER-B. Metabolism
In a cell, reactions take place in a series of steps called:
A. Metabolic pathways
B. Chemical bonding
C. Synthesis
D. Hydrolysis - ANSWER-A. Metabolic pathways
What is the most fundamental unit of biology?
A. Atom
B. Cell
C. Tissue
D. Organ - ANSWER-B. Cell
Which type of cell contains no defined nucleus?
A. Prokaryotic cell
B. Eukaryotic cell
C. Animal cell
D. Protest cell - ANSWER-A. Prokaryotic cell
What is the primary purpose of flagella on the surface of cells?
A. Movement of the cell
B. Removal of cellular waste
C. Replication of chromosomes
D. Production of energy - ANSWER-A. Movement of the cell
Which cell organelle functions to transport materials from the endoplasmic reticulum
throughout the cell?
A. Ribosome
B. Golgi apparatus
C. Lysosome
