HESI A2 QUESTIONS & ANSWERS 2026-2027 | COMPREHENSIV… 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 Questions &
Answers 2026-2027 |
Comprehensive Exam
Review (Rationales)
Verified Answers Exam Ready With Rationales
138 QUESTIONS
DOCUMENT OVERVIEW
This comprehensive HESI A2 review provides 138 questions with pre-supplied correct
answers and detailed rationales, including visual aids. It covers fundamental academic and
science concepts essential for healthcare program admission. This resource is ideal for
thorough study and effective preparation for certification exams.
CONTENTS
• Math Fundamentals • Reading Comprehension
• Vocabulary & Terminology • Biochemistry & Organic Chemistry
• Cell Biology • Cellular Respiration & Metabolism
• Cell Division & Genetics • Evolution & Taxonomy
• Basic Chemistry & Biology
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 138
Order of Operations (PEMDAS)
CORRECT ANSWER
Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction
RATIONALE
The mnemonic PEMDAS dictates the standard order for evaluating mathematical expressions to
ensure a consistent and unambiguous result. This sequence prioritizes operations within
parentheses, followed by exponents, then multiplication and division (from left to right), and finally
addition and subtraction (from left to right).
Q2 QUESTION 2 OF 138
Roman Numerals
CORRECT ANSWER
I-1
V-5
X - 10
L - 50
C - 100
D - 500
M - 1000
Page 2
, RATIONALE
Roman numerals represent values using specific letters as symbols, where each letter corresponds
to a fixed numerical equivalent. The system relies on the additive and subtractive principles of
these symbols to construct larger numbers.
Q3 QUESTION 3 OF 138
Military Time Conversion
CORRECT ANSWER
If numbers is over 12 subtract 12
RATIONALE
Military time uses a 24-hour clock, so times from 13:00 onwards are converted to standard 12-hour
format by subtracting 12. This adjustment accounts for the transition from PM hours to the next
day's AM hours.
Q4 QUESTION 4 OF 138
Metric System Prefixes
Page 3
, CORRECT ANSWER
micro = 1/1,000,000
milli = 1/1000
centi = 1/100
deci = 1/10
basic unit (meter, liter, gram) = 1
deca = 10
hecto = 100
kilo = 1000
mega = 1,000,000
RATIONALE
The metric system utilizes prefixes to denote powers of ten relative to the base unit. Understanding
these logarithmic relationships, such as micro (10⁻⁶) and kilo (10³), is fundamental for accurate
conversions.
Q5 QUESTION 5 OF 138
English to Metric Conversions
CORRECT ANSWER
Centimeters to inches = Multiply by .394
Inches to centimeters = Multiply by 2.54
Kilograms to pounds = Multiply by 2.205
Pounds to kilograms = Multiply by .454
Celsius to Fahrenheit = Celsius x 1.8 +32
Fahrenheit to Celsius = Fahrenheit - .8
RATIONALE
Accurate conversions between metric and imperial units are essential for precise medical
calculations, ensuring correct medication dosages and patient measurements. Understanding
these conversion factors allows for seamless data interpretation across different measurement
systems.
Q6 QUESTION 6 OF 138
Metric Abbreviations and Prefixes
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 Questions &
Answers 2026-2027 |
Comprehensive Exam
Review (Rationales)
Verified Answers Exam Ready With Rationales
138 QUESTIONS
DOCUMENT OVERVIEW
This comprehensive HESI A2 review provides 138 questions with pre-supplied correct
answers and detailed rationales, including visual aids. It covers fundamental academic and
science concepts essential for healthcare program admission. This resource is ideal for
thorough study and effective preparation for certification exams.
CONTENTS
• Math Fundamentals • Reading Comprehension
• Vocabulary & Terminology • Biochemistry & Organic Chemistry
• Cell Biology • Cellular Respiration & Metabolism
• Cell Division & Genetics • Evolution & Taxonomy
• Basic Chemistry & Biology
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 138
Order of Operations (PEMDAS)
CORRECT ANSWER
Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction
RATIONALE
The mnemonic PEMDAS dictates the standard order for evaluating mathematical expressions to
ensure a consistent and unambiguous result. This sequence prioritizes operations within
parentheses, followed by exponents, then multiplication and division (from left to right), and finally
addition and subtraction (from left to right).
Q2 QUESTION 2 OF 138
Roman Numerals
CORRECT ANSWER
I-1
V-5
X - 10
L - 50
C - 100
D - 500
M - 1000
Page 2
, RATIONALE
Roman numerals represent values using specific letters as symbols, where each letter corresponds
to a fixed numerical equivalent. The system relies on the additive and subtractive principles of
these symbols to construct larger numbers.
Q3 QUESTION 3 OF 138
Military Time Conversion
CORRECT ANSWER
If numbers is over 12 subtract 12
RATIONALE
Military time uses a 24-hour clock, so times from 13:00 onwards are converted to standard 12-hour
format by subtracting 12. This adjustment accounts for the transition from PM hours to the next
day's AM hours.
Q4 QUESTION 4 OF 138
Metric System Prefixes
Page 3
, CORRECT ANSWER
micro = 1/1,000,000
milli = 1/1000
centi = 1/100
deci = 1/10
basic unit (meter, liter, gram) = 1
deca = 10
hecto = 100
kilo = 1000
mega = 1,000,000
RATIONALE
The metric system utilizes prefixes to denote powers of ten relative to the base unit. Understanding
these logarithmic relationships, such as micro (10⁻⁶) and kilo (10³), is fundamental for accurate
conversions.
Q5 QUESTION 5 OF 138
English to Metric Conversions
CORRECT ANSWER
Centimeters to inches = Multiply by .394
Inches to centimeters = Multiply by 2.54
Kilograms to pounds = Multiply by 2.205
Pounds to kilograms = Multiply by .454
Celsius to Fahrenheit = Celsius x 1.8 +32
Fahrenheit to Celsius = Fahrenheit - .8
RATIONALE
Accurate conversions between metric and imperial units are essential for precise medical
calculations, ensuring correct medication dosages and patient measurements. Understanding
these conversion factors allows for seamless data interpretation across different measurement
systems.
Q6 QUESTION 6 OF 138
Metric Abbreviations and Prefixes
Page 4
