AAMC MCAT Practice Exam 1 2025/2026
Exam Questions with 100% Correct
Answers | Latest Update
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 - 🧠 ANSWER ✔✔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. - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔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.
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3
, 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. - 🧠 ANSWER ✔✔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
Exam Questions with 100% Correct
Answers | Latest Update
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 - 🧠 ANSWER ✔✔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. - 🧠 ANSWER ✔✔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 - 🧠 ANSWER ✔✔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.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, 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. - 🧠 ANSWER ✔✔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
