HESI A2 Entrance Biology PRACTICE EXAM 2026/2027
AND HIGH YIELD PRACTICE QUESTIONS COMPLETE
ACCURATE EXAM APPROVED QUESTIONS AND CORRECT
VERIFIED SOLUTIONS (100% CORRECT VERIFIED
ANSWERS) CURRENTLY UPDATED VERSION 2026
EDITION
An organism that has a genotype of two dominant alleles for one gene is:
A) Heterozygous.
B) Homozygous.
C) Multiparous.
D) Nulliparous
ANSWERS: Homozygous.
The method by which mRNA is created is begun by which of the
following processes?
A) Replication.
B) Translation.
C) Splitting.
D) Transcription.
ANSWERS: Transcription.
, Which scientists are responsible for describing the structure of DNA?
A) Watson and Crick.
B) Watson and Holmes.
C) Holmes and Croiger.
D) Brown and Curie.
ANSWERS: Watson and Crick.
The oxidation of the NADH molecules to produce oxygen and water in
cellular respiration takes place in a series of steps defined as:
A) Cellular inspiration.
B) Krebs cycle.
C) Electron transport chain.
D) Cellular conversion.
ANSWERS: Electron transport chain.
, All genes can be described using the Punnett Square method. True or
False?
A) True
B)False
ANSWERS: False
The term pleiotropy is best defined as:
A) A condition in which multiple genes are missing.
B) A situation in which one gene remains unexpressed.
C) One gene influencing multiple, seemingly unrelated phenotypic traits.
D) Two genes affected by a single allele.
ANSWERS: One gene influencing multiple, seemingly unrelated
phenotypic traits.
Which molecules are responsible for the base pairing action in DNA?
A) Phosphate groups.
B) Sugar molecules.
C) Nitrogenous bases.
D)Codons.
ANSWERS: Nitrogenous bases.
AND HIGH YIELD PRACTICE QUESTIONS COMPLETE
ACCURATE EXAM APPROVED QUESTIONS AND CORRECT
VERIFIED SOLUTIONS (100% CORRECT VERIFIED
ANSWERS) CURRENTLY UPDATED VERSION 2026
EDITION
An organism that has a genotype of two dominant alleles for one gene is:
A) Heterozygous.
B) Homozygous.
C) Multiparous.
D) Nulliparous
ANSWERS: Homozygous.
The method by which mRNA is created is begun by which of the
following processes?
A) Replication.
B) Translation.
C) Splitting.
D) Transcription.
ANSWERS: Transcription.
, Which scientists are responsible for describing the structure of DNA?
A) Watson and Crick.
B) Watson and Holmes.
C) Holmes and Croiger.
D) Brown and Curie.
ANSWERS: Watson and Crick.
The oxidation of the NADH molecules to produce oxygen and water in
cellular respiration takes place in a series of steps defined as:
A) Cellular inspiration.
B) Krebs cycle.
C) Electron transport chain.
D) Cellular conversion.
ANSWERS: Electron transport chain.
, All genes can be described using the Punnett Square method. True or
False?
A) True
B)False
ANSWERS: False
The term pleiotropy is best defined as:
A) A condition in which multiple genes are missing.
B) A situation in which one gene remains unexpressed.
C) One gene influencing multiple, seemingly unrelated phenotypic traits.
D) Two genes affected by a single allele.
ANSWERS: One gene influencing multiple, seemingly unrelated
phenotypic traits.
Which molecules are responsible for the base pairing action in DNA?
A) Phosphate groups.
B) Sugar molecules.
C) Nitrogenous bases.
D)Codons.
ANSWERS: Nitrogenous bases.
