1
HESI A2 Biology Practice
Questions 2025–2026 – Complete
Exam Review with Detailed
Answers
In the hierarchic system of classification which is the least
inclusive? - Correct Answer-Species
After observing an event, you develop an explanation this is: -
Correct Answer-Hypothesis
A molecule of water is bonded with another molecule of water
by what type of bond? - Correct Answer-Hydrogen
Which is a benefit of the intermolecular hydrogen bonding of
water: - Correct 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: - Correct Answer-nucleic acids
1
, 2
Lipids are better known as fats but what are they specifically?
- Correct Answer-Fatty acids, phospholipids, steroids
What are the 2 categories of fatty acids? - Correct Answer-
saturated fats and unsaturated fats
How do phospholipids function in cells? - Correct Answer-
They are integral components of plasma membrane
Which of the biologic molecules are considered the most
significant contributor to cellular function? - Correct Answer-
Proteins
Proteins are polymers of which? - Correct Answer-Amino
Acids
Which of the following proteins catalyze different reactions or
processes? - Correct Answer-Enzyme
Which of the biologic molecules are components of the
molecules of inheritance? - Correct Answer-Nucleic Acids
2
HESI A2 Biology Practice
Questions 2025–2026 – Complete
Exam Review with Detailed
Answers
In the hierarchic system of classification which is the least
inclusive? - Correct Answer-Species
After observing an event, you develop an explanation this is: -
Correct Answer-Hypothesis
A molecule of water is bonded with another molecule of water
by what type of bond? - Correct Answer-Hydrogen
Which is a benefit of the intermolecular hydrogen bonding of
water: - Correct 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: - Correct Answer-nucleic acids
1
, 2
Lipids are better known as fats but what are they specifically?
- Correct Answer-Fatty acids, phospholipids, steroids
What are the 2 categories of fatty acids? - Correct Answer-
saturated fats and unsaturated fats
How do phospholipids function in cells? - Correct Answer-
They are integral components of plasma membrane
Which of the biologic molecules are considered the most
significant contributor to cellular function? - Correct Answer-
Proteins
Proteins are polymers of which? - Correct Answer-Amino
Acids
Which of the following proteins catalyze different reactions or
processes? - Correct Answer-Enzyme
Which of the biologic molecules are components of the
molecules of inheritance? - Correct Answer-Nucleic Acids
2
