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ALL RIGHTS RESERVED.
BIOC 3021 Exam 2 Quiz Questions And
Answers (Guaranteed A+)
If a noncompetitive inhibitor is added to an enzyme reaction then:
a. The Vmax increases and the Km decreases
b. The Vmax decreases and the Km increases
c. The Vmax stays the same and the Km decreases
d. The Vmax stays the same and the Km increases
e. The Vmax decreases and the Km stays the same - answer✔e. The Vmax decreases and the
Km stays the same
If a competitive inhibitor is added to an enzyme reaction then:
a. The Vmax increases and the Km decreases
b. The Vmax decreases and the Km increases
c. The Vmax stays the same and the Km decreases
d. The Vmax stays the same and the Km increases
e. The Vmax decreases and the Km stays the same - answer✔d. The Vmax stays the same and
the Km increases
If the substrate concentration [S] is equal to the Km of an enzyme, the reaction rate is:
a. equal to the Vmax
b. very low
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ALL RIGHTS RESERVED.
c. very high
d. equal to ½ of the Vmax
e. not changed by adding more substrate - answer✔d. equal to 1/2 of the Vmax
Which pair is thought to have the tightest binding/assoc. during enzyme catalysis?
a. substrate and enzyme
b. transition state intermediate
and enzyme
c. water and enzyme
d. product and enzyme
e. hydroxyl ions and enzyme - answer✔b. transition state intermediate and enzyme
The name of the relatively stable covalent intermediate in the chymotrypsin reaction is:
a. first tetrahedral intermediate
b. nucleophilic intermediate
c. electrophilic intermediate
d. acyl enzyme intermediate
e. second tetrahedral intermediate - answer✔d. acyl enzyme intermediate
In the catalytic triad of chymotrypsin, which amino acid R-group is the closest to the catalytic
serine residue?
a. histidine
b. alanine
c. aspartate
d. lysine
e. arginine - answer✔a. histidine
2|Page
ALL RIGHTS RESERVED.
BIOC 3021 Exam 2 Quiz Questions And
Answers (Guaranteed A+)
If a noncompetitive inhibitor is added to an enzyme reaction then:
a. The Vmax increases and the Km decreases
b. The Vmax decreases and the Km increases
c. The Vmax stays the same and the Km decreases
d. The Vmax stays the same and the Km increases
e. The Vmax decreases and the Km stays the same - answer✔e. The Vmax decreases and the
Km stays the same
If a competitive inhibitor is added to an enzyme reaction then:
a. The Vmax increases and the Km decreases
b. The Vmax decreases and the Km increases
c. The Vmax stays the same and the Km decreases
d. The Vmax stays the same and the Km increases
e. The Vmax decreases and the Km stays the same - answer✔d. The Vmax stays the same and
the Km increases
If the substrate concentration [S] is equal to the Km of an enzyme, the reaction rate is:
a. equal to the Vmax
b. very low
1|Page
, ©FYNDLAY EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
c. very high
d. equal to ½ of the Vmax
e. not changed by adding more substrate - answer✔d. equal to 1/2 of the Vmax
Which pair is thought to have the tightest binding/assoc. during enzyme catalysis?
a. substrate and enzyme
b. transition state intermediate
and enzyme
c. water and enzyme
d. product and enzyme
e. hydroxyl ions and enzyme - answer✔b. transition state intermediate and enzyme
The name of the relatively stable covalent intermediate in the chymotrypsin reaction is:
a. first tetrahedral intermediate
b. nucleophilic intermediate
c. electrophilic intermediate
d. acyl enzyme intermediate
e. second tetrahedral intermediate - answer✔d. acyl enzyme intermediate
In the catalytic triad of chymotrypsin, which amino acid R-group is the closest to the catalytic
serine residue?
a. histidine
b. alanine
c. aspartate
d. lysine
e. arginine - answer✔a. histidine
2|Page
