HESI A2 Biology Exam Questions and
Answers 100% Pass
In the hierarchic system of classification which is the least inclusive? - ANSWER-
Species
After observing an event, you develop an explanation this is: - ANSWER-
Hypothesis
A molecule of water is bonded with another molecule of water by what type of
bond? - ANSWER-Hydrogen
Which is a benefit of the intermolecular hydrogen bonding of water: - ANSWER-
1- Water has a relatively high specific heat value.
2- Water has strong cohesive and adhesive properties.
3- Polarity of water allows it to act as a versatile solvent.
Of all molecules that are significant to biology which are considered important: -
ANSWER-nucleic acids
Lipids are better known as fats but what are they specifically? - ANSWER-Fatty
acids, phospholipids, steroids
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, What are the 2 categories of fatty acids? - ANSWER-saturated fats and unsaturated
fats
How do phospholipids function in cells? - ANSWER-They are integral
components of plasma membrane
Which of the biologic molecules are considered the most significant contributor to
cellular function? - ANSWER-Proteins
Proteins are polymers of which? - ANSWER-Amino Acids
Which of the following proteins catalyze different reactions or processes? -
ANSWER-Enzyme
Which of the biologic molecules are components of the molecules of inheritance? -
ANSWER-Nucleic Acids
What is the sum of all chemical reactions that occur in an organism? - ANSWER-
Metabolism
In a cell, reactions take place in a series of steps called: - ANSWER-Metabolic
pathways
What is the fundamental unit of biology? - ANSWER-Cell
Which type of cell contains no defined nucleus? - ANSWER-Prokaryotic cell
What is the primary purpose of the flagella on the surface of cells? - ANSWER-
movement of the cell
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Answers 100% Pass
In the hierarchic system of classification which is the least inclusive? - ANSWER-
Species
After observing an event, you develop an explanation this is: - ANSWER-
Hypothesis
A molecule of water is bonded with another molecule of water by what type of
bond? - ANSWER-Hydrogen
Which is a benefit of the intermolecular hydrogen bonding of water: - ANSWER-
1- Water has a relatively high specific heat value.
2- Water has strong cohesive and adhesive properties.
3- Polarity of water allows it to act as a versatile solvent.
Of all molecules that are significant to biology which are considered important: -
ANSWER-nucleic acids
Lipids are better known as fats but what are they specifically? - ANSWER-Fatty
acids, phospholipids, steroids
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1
, What are the 2 categories of fatty acids? - ANSWER-saturated fats and unsaturated
fats
How do phospholipids function in cells? - ANSWER-They are integral
components of plasma membrane
Which of the biologic molecules are considered the most significant contributor to
cellular function? - ANSWER-Proteins
Proteins are polymers of which? - ANSWER-Amino Acids
Which of the following proteins catalyze different reactions or processes? -
ANSWER-Enzyme
Which of the biologic molecules are components of the molecules of inheritance? -
ANSWER-Nucleic Acids
What is the sum of all chemical reactions that occur in an organism? - ANSWER-
Metabolism
In a cell, reactions take place in a series of steps called: - ANSWER-Metabolic
pathways
What is the fundamental unit of biology? - ANSWER-Cell
Which type of cell contains no defined nucleus? - ANSWER-Prokaryotic cell
What is the primary purpose of the flagella on the surface of cells? - ANSWER-
movement of the cell
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