AAMC MCAT Practice Exam 1
Multiple Choices Questions
with Latest 2025-2026 Correct
Answers GRADED A+
In the chromatography of the reaction mixture, water
absorbed on cellulose functioned as the stationary
phase. What was the principal factor determining the
migration of individual components in the sample?
A) Hydrogen bonding
B) Solute concentration
C) Stationary phase concentration
D) Thickness of paper
- ANS - A) Hydrogen bonding
The answer to this question is A because the relative
amount of hydrogen bonding to the stationary phase
will determine the relative rate of migration of the
various components in the sample.
,What assumption is being made if scientists conclude
that aspartic acid was formed by the prebiological
synthesis in the passage?
A) Aspartic acid is unstable at temperatures below 150
degrees C.
B) All of the malic acid underwent the dehydration
reaction to form fumaric/maleic acid.
C) Compound A and cyanide were available on
primitive Earth.
D) The reaction between ammonia and fumaric acid
was catalyzed by the presence of water.
- ANS - C) Compound A and cyanide were available on
primitive Earth.
he answer to this question is C since, in order for the
experimental reaction sequence to be relevant to the
primordial formation of aspartic acid, the starting
materials used (Compound A and cyanide) are assumed
to have been available.
,According to the developed chromatography plate
shown below, what is the approximate Rf value of
aspartic acid?
aspartic acid = 2
solvent front = 10
A) 0.20
B) 0.50
C) 5
D) 10
- ANS - The answer to this question is A (0.20) because
Rf is the ratio of the distance travelled by the analyte
relative to the solvent front during a chromatographic
separation. Aspartic acid travelled two units, while the
solvent front travelled ten units, giving an Rf of 2/10 =
0.20 for aspartic acid.
Which of the following statements does NOT correctly
describe the dehydration of malic acid to fumaric acid
and maleic acid?
, A) The reaction occurs most readily with tertiary
alcohols.
B) The reaction involves the loss of a water molecule.
C) The reaction has a carbocation intermediate.
D) The reaction is stereospecific.
- ANS - D) The reaction is stereospecific.
The answer to this question is D because the fact that
both fumaric and maleic acid are produced means that
the dehydration of malic acid is NOT stereospecific.
What type of functional group is formed when aspartic
acid reacts with another amino acid to form a peptide
bond?
A) An amine group
B) An aldehyde group
C) An amide group
D) A carboxyl group
- ANS - C) An amide group
Multiple Choices Questions
with Latest 2025-2026 Correct
Answers GRADED A+
In the chromatography of the reaction mixture, water
absorbed on cellulose functioned as the stationary
phase. What was the principal factor determining the
migration of individual components in the sample?
A) Hydrogen bonding
B) Solute concentration
C) Stationary phase concentration
D) Thickness of paper
- ANS - A) Hydrogen bonding
The answer to this question is A because the relative
amount of hydrogen bonding to the stationary phase
will determine the relative rate of migration of the
various components in the sample.
,What assumption is being made if scientists conclude
that aspartic acid was formed by the prebiological
synthesis in the passage?
A) Aspartic acid is unstable at temperatures below 150
degrees C.
B) All of the malic acid underwent the dehydration
reaction to form fumaric/maleic acid.
C) Compound A and cyanide were available on
primitive Earth.
D) The reaction between ammonia and fumaric acid
was catalyzed by the presence of water.
- ANS - C) Compound A and cyanide were available on
primitive Earth.
he answer to this question is C since, in order for the
experimental reaction sequence to be relevant to the
primordial formation of aspartic acid, the starting
materials used (Compound A and cyanide) are assumed
to have been available.
,According to the developed chromatography plate
shown below, what is the approximate Rf value of
aspartic acid?
aspartic acid = 2
solvent front = 10
A) 0.20
B) 0.50
C) 5
D) 10
- ANS - The answer to this question is A (0.20) because
Rf is the ratio of the distance travelled by the analyte
relative to the solvent front during a chromatographic
separation. Aspartic acid travelled two units, while the
solvent front travelled ten units, giving an Rf of 2/10 =
0.20 for aspartic acid.
Which of the following statements does NOT correctly
describe the dehydration of malic acid to fumaric acid
and maleic acid?
, A) The reaction occurs most readily with tertiary
alcohols.
B) The reaction involves the loss of a water molecule.
C) The reaction has a carbocation intermediate.
D) The reaction is stereospecific.
- ANS - D) The reaction is stereospecific.
The answer to this question is D because the fact that
both fumaric and maleic acid are produced means that
the dehydration of malic acid is NOT stereospecific.
What type of functional group is formed when aspartic
acid reacts with another amino acid to form a peptide
bond?
A) An amine group
B) An aldehyde group
C) An amide group
D) A carboxyl group
- ANS - C) An amide group
