HESI A2 BIOLOGY QUESTIONS & ANSWERS 2026-2027 | LATEST VERIFIE… EXAM
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
HESI A2 Biology
Questions & Answers
2026-2027 | Latest
Verified Exam Questions
(Rationales)
Verified Answers Exam Ready With Rationales
108 QUESTIONS
DOCUMENT OVERVIEW
This verified HESI A2 Biology exam preparation document contains 108 questions with provided
correct answers and detailed rationales. It covers fundamental biological concepts, offering a
comprehensive study resource for students. This material is ideal for reviewing key biological
principles and preparing for certification exams.
CONTENTS
• Scientific Inquiry & Organization • Biochemistry & Macromolecules
• Cellular Biology: Structure & Function • Cellular Processes: Energy & Metabolism
• Cellular Processes: Reproduction & • Genetics & Inheritance
Division
• Organismal Biology & Systems • Environmental & Chemical Concepts
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 108
Hierarchic Organizational system for nomenclature
CORRECT ANSWER
Kingdom
Phylum
Class
Order
Family
Genus
Species (Least)
"Keep Penguins Cool Or Find Good Shelter"
RATIONALE
This mnemonic aids recall of the Linnaean system of biological classification, which orders organisms
from broad categories to specific ones, with "Kingdom" being the most inclusive and "Species" the least.
The acronym "King Philip Came Over For Good Soup" is a common way to remember this hierarchy.
Q2 QUESTION 2 OF 108
Scientific Method
CORRECT ANSWER
Observation
Hypothesis
Experiment
Conclusion
RATIONALE
The scientific method is a systematic process that begins with observing a phenomenon, formulating a
testable hypothesis, conducting experiments to gather data, and finally drawing a conclusion based on
the experimental results. This structured approach ensures that scientific inquiry is objective and
reproducible.
Page 2
, Q3 QUESTION 3 OF 108
The variations of the genes for a single trait are called
CORRECT ANSWER
Alleles
RATIONALE
Alleles are the different forms or versions of a gene that arise by mutation and are found at the same place
on a chromosome, determining variations in a particular trait. This question tests the understanding of
basic Mendelian genetics and the definition of gene variants.
Q4 QUESTION 4 OF 108
The LOCATION on a chromosome where a particular gene is located is known as the:
CORRECT ANSWER
Locus
RATIONALE
A locus precisely defines the specific position of a gene on a chromosome. This term is fundamental to
understanding gene mapping and inheritance patterns.
Q5 QUESTION 5 OF 108
Water
CORRECT ANSWER
All life, and therefore biology , occurs in water.
Page 3
, RATIONALE
Water's universal solvent properties and role in biochemical reactions make it the indispensable medium
for all known biological processes. This highlights water's fundamental importance as the cradle of life
and the primary environment for biological study.
Q6 QUESTION 6 OF 108
Properties of Water
CORRECT ANSWER
2 Hydrogen bonds Covalently bonded to Oxygen.
Hydrogen Bonding between molecules.
- High specific heat
- Large bodies or water stabilize climates
- Strong cohesive and adhesive properties
- Water freezes forms a lattice crystal resulting in ice floating in water.
- Polarity of water allows it to act as a universal solvent.
- Water can be used to dissolve different solvents.
RATIONALE
Water's unique properties, including its high specific heat, cohesive/adhesive forces, and solvent
capabilities, stem from its polar molecular structure and the resulting extensive hydrogen bonding
network between molecules. This hydrogen bonding is the underlying principle that explains why ice
floats, climates are stabilized by large bodies of water, and water acts as a versatile solvent.
Q7 QUESTION 7 OF 108
Carbohydrates
CORRECT ANSWER
Long chains, or polymers of sugar. Most importantly form the backbone of DNA and RNA.
RATIONALE
Carbohydrates are saccharide polymers that serve as energy sources and structural components, though
their role in forming the nucleic acid backbone is a key characteristic of their broader biochemical
significance. The fundamental concept tested is the definition and diverse functions of carbohydrates
beyond simple sugars.
Page 4
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
HESI A2 Biology
Questions & Answers
2026-2027 | Latest
Verified Exam Questions
(Rationales)
Verified Answers Exam Ready With Rationales
108 QUESTIONS
DOCUMENT OVERVIEW
This verified HESI A2 Biology exam preparation document contains 108 questions with provided
correct answers and detailed rationales. It covers fundamental biological concepts, offering a
comprehensive study resource for students. This material is ideal for reviewing key biological
principles and preparing for certification exams.
CONTENTS
• Scientific Inquiry & Organization • Biochemistry & Macromolecules
• Cellular Biology: Structure & Function • Cellular Processes: Energy & Metabolism
• Cellular Processes: Reproduction & • Genetics & Inheritance
Division
• Organismal Biology & Systems • Environmental & Chemical Concepts
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 108
Hierarchic Organizational system for nomenclature
CORRECT ANSWER
Kingdom
Phylum
Class
Order
Family
Genus
Species (Least)
"Keep Penguins Cool Or Find Good Shelter"
RATIONALE
This mnemonic aids recall of the Linnaean system of biological classification, which orders organisms
from broad categories to specific ones, with "Kingdom" being the most inclusive and "Species" the least.
The acronym "King Philip Came Over For Good Soup" is a common way to remember this hierarchy.
Q2 QUESTION 2 OF 108
Scientific Method
CORRECT ANSWER
Observation
Hypothesis
Experiment
Conclusion
RATIONALE
The scientific method is a systematic process that begins with observing a phenomenon, formulating a
testable hypothesis, conducting experiments to gather data, and finally drawing a conclusion based on
the experimental results. This structured approach ensures that scientific inquiry is objective and
reproducible.
Page 2
, Q3 QUESTION 3 OF 108
The variations of the genes for a single trait are called
CORRECT ANSWER
Alleles
RATIONALE
Alleles are the different forms or versions of a gene that arise by mutation and are found at the same place
on a chromosome, determining variations in a particular trait. This question tests the understanding of
basic Mendelian genetics and the definition of gene variants.
Q4 QUESTION 4 OF 108
The LOCATION on a chromosome where a particular gene is located is known as the:
CORRECT ANSWER
Locus
RATIONALE
A locus precisely defines the specific position of a gene on a chromosome. This term is fundamental to
understanding gene mapping and inheritance patterns.
Q5 QUESTION 5 OF 108
Water
CORRECT ANSWER
All life, and therefore biology , occurs in water.
Page 3
, RATIONALE
Water's universal solvent properties and role in biochemical reactions make it the indispensable medium
for all known biological processes. This highlights water's fundamental importance as the cradle of life
and the primary environment for biological study.
Q6 QUESTION 6 OF 108
Properties of Water
CORRECT ANSWER
2 Hydrogen bonds Covalently bonded to Oxygen.
Hydrogen Bonding between molecules.
- High specific heat
- Large bodies or water stabilize climates
- Strong cohesive and adhesive properties
- Water freezes forms a lattice crystal resulting in ice floating in water.
- Polarity of water allows it to act as a universal solvent.
- Water can be used to dissolve different solvents.
RATIONALE
Water's unique properties, including its high specific heat, cohesive/adhesive forces, and solvent
capabilities, stem from its polar molecular structure and the resulting extensive hydrogen bonding
network between molecules. This hydrogen bonding is the underlying principle that explains why ice
floats, climates are stabilized by large bodies of water, and water acts as a versatile solvent.
Q7 QUESTION 7 OF 108
Carbohydrates
CORRECT ANSWER
Long chains, or polymers of sugar. Most importantly form the backbone of DNA and RNA.
RATIONALE
Carbohydrates are saccharide polymers that serve as energy sources and structural components, though
their role in forming the nucleic acid backbone is a key characteristic of their broader biochemical
significance. The fundamental concept tested is the definition and diverse functions of carbohydrates
beyond simple sugars.
Page 4
