HESI A2 Biology Exam 2025 Questions
and Answers
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
What are the 2 categories of fatty acids? - ANSWER✔✔-saturated fats and unsaturated fats
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
, 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
Which cell organelle functions to transport materials from the endoplasmic reticulum throughout
the cell? - ANSWER✔✔-Golgi apparatus
Which are the distant organelles that produce cell energy? - ANSWER✔✔-Mitochondrion and
chlorophast
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
and Answers
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
What are the 2 categories of fatty acids? - ANSWER✔✔-saturated fats and unsaturated fats
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
, 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
Which cell organelle functions to transport materials from the endoplasmic reticulum throughout
the cell? - ANSWER✔✔-Golgi apparatus
Which are the distant organelles that produce cell energy? - ANSWER✔✔-Mitochondrion and
chlorophast
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
