HESI A2 Clear Biology Questions With
Answers
Why is polarity the most important characteristic of water? - CORRECT ANSWER-The
results of the polarity are hydrogen bonding, a high specific heat value, and its versatile
solvent properties.
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
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 - CORRECT ANSWER-B. Smooth ER
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
Which part of cell respiration produces the greatest amount of ATP?
A. ETC
B. Glycolysis
C. Krebs cycle
D. Fermentation - CORRECT ANSWER-A. ETC
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 - CORRECT
ANSWER-A. Water is a raw material for the light reactions in photosynthesis
,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. - CORRECT ANSWER-A. Both result in a net
production of ATP and NADH
Why is it important for cells to undergo mitosis? - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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. - CORRECT 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 - CORRECT ANSWER-C. Proteins
Proteins are polymers of which of the following?
A. Monosaccharides
B. Amino acids
C. Fatty acids
Answers
Why is polarity the most important characteristic of water? - CORRECT ANSWER-The
results of the polarity are hydrogen bonding, a high specific heat value, and its versatile
solvent properties.
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
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 - CORRECT ANSWER-B. Smooth ER
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
Which part of cell respiration produces the greatest amount of ATP?
A. ETC
B. Glycolysis
C. Krebs cycle
D. Fermentation - CORRECT ANSWER-A. ETC
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 - CORRECT
ANSWER-A. Water is a raw material for the light reactions in photosynthesis
,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. - CORRECT ANSWER-A. Both result in a net
production of ATP and NADH
Why is it important for cells to undergo mitosis? - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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. - CORRECT 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 - CORRECT ANSWER-C. Proteins
Proteins are polymers of which of the following?
A. Monosaccharides
B. Amino acids
C. Fatty acids
