HESI A2 RETAKE STUDY GUIDE
WITH DETAILED QUESTIONS
AND ACCURATE ANSWERS
GRADED A+. (2026 VERSION)
What is the most inclusive category in biology? - answer-Kingdom
What is the least inclusive/ most restrictive? - answer-Species
What are the four steps of the scientific process in order? - answer-Observation,
Hypothesis, Experiment, Conclusion
What is the amount of heat necessary to raise the temperature of 1 gram of that
molecule by 1 degree celsius? - answer-Specific heat
The ability of a molecule to stay bonded or attracted to another molecule of the same
substance - answer-Cohesion
The ability of a molecule to bond or attract to other molecules or substances - answer-
Adhesion
Long chains, or polymers, of sugars that provide storage, structure and energy. - answer-
Carbohydrate
carbohydrates form the backbone of important molecules such as _____ and _______ -
answer-DNA & RNA
Lipids pertains to ___ (3 answers) - answer-Fatty acids, phospholipids, and steroids.
, Fatty acids that contain no double bonds in their hydrocarbon tail - answer-Saturated
fats
Fatty acids that contain one or more double bond, solid at room temperature. - answer-
Unsaturated fats
Cardiovascular problems are likely associated with diets involving high quantities of
what type of fatty acid? - answer-Saturated fats
____ is a lipid that is important to the function of the cell membrane because it creates a
barrier that protects the cell. - answer-Phospholipid
Many ____ (a type of lipid) are precursors to significant hormones and drugs. - answer-
Steroids
Proteins are the polymers of 20 molecules called _____ - answer-amino acids
Particular types of proteins that act to catalyze nearly all reactions. - answer-Enzymes
a unique molecule specific to a particular organism that contains the code that is
necessary for replication - answer-DNA
used in the transfer of information from DNA to protein level and as a messenger in
most species of the genetic code - answer-RNA
The sum of all chemical reactions that occur in an organism - answer-Metabolism
What are the two types of cells? - answer-prokaryotic and eukaryotic
WITH DETAILED QUESTIONS
AND ACCURATE ANSWERS
GRADED A+. (2026 VERSION)
What is the most inclusive category in biology? - answer-Kingdom
What is the least inclusive/ most restrictive? - answer-Species
What are the four steps of the scientific process in order? - answer-Observation,
Hypothesis, Experiment, Conclusion
What is the amount of heat necessary to raise the temperature of 1 gram of that
molecule by 1 degree celsius? - answer-Specific heat
The ability of a molecule to stay bonded or attracted to another molecule of the same
substance - answer-Cohesion
The ability of a molecule to bond or attract to other molecules or substances - answer-
Adhesion
Long chains, or polymers, of sugars that provide storage, structure and energy. - answer-
Carbohydrate
carbohydrates form the backbone of important molecules such as _____ and _______ -
answer-DNA & RNA
Lipids pertains to ___ (3 answers) - answer-Fatty acids, phospholipids, and steroids.
, Fatty acids that contain no double bonds in their hydrocarbon tail - answer-Saturated
fats
Fatty acids that contain one or more double bond, solid at room temperature. - answer-
Unsaturated fats
Cardiovascular problems are likely associated with diets involving high quantities of
what type of fatty acid? - answer-Saturated fats
____ is a lipid that is important to the function of the cell membrane because it creates a
barrier that protects the cell. - answer-Phospholipid
Many ____ (a type of lipid) are precursors to significant hormones and drugs. - answer-
Steroids
Proteins are the polymers of 20 molecules called _____ - answer-amino acids
Particular types of proteins that act to catalyze nearly all reactions. - answer-Enzymes
a unique molecule specific to a particular organism that contains the code that is
necessary for replication - answer-DNA
used in the transfer of information from DNA to protein level and as a messenger in
most species of the genetic code - answer-RNA
The sum of all chemical reactions that occur in an organism - answer-Metabolism
What are the two types of cells? - answer-prokaryotic and eukaryotic
