BCHM 4360 EXAM 1 CHAPTER 4
2026 LATEST UPDATES QUESTIONS
AND CORRECT VERIFIED ANSWERS
ALREADY GRADED A+
The constant for the ES formation, k-1 = the rate constant for ES
dissociation, and K+2 = the rate constant for product formation
a. K-1 is highly negligible compared to k+2
b. The rate of formation of ES is equal to the rate of its depletion over the
course of the reaction
c. The rate of formation of ES exceeds the rate of depletion over the
course of the reaction
d. K+2 is negligible when compared to k+1 e. The enzyme is saturated
with substrate - ANS-b. The rate of formation of ES is equal to the
rate of its depletion over the course of the reaction
In competitive inhibition, increasing the concentration substrate:
a- decreases the overall rate of reaction
b- increases the overall rate of reaction
c- is without effect
d- the observed effect depend on the inhibitor
e- competitive inhibitors do not affect the rate of the reaction - ANS-b-
increases the overall rate of reaction
A hydrogen bond is
a. A sharing of a pair of electrons between a hydrogen and an oxygen
nucleus
b. A sharing of a pair of electrons between a hydrogen nucleus and either
an oxygen or a nitrogen nucleus
,c. An attractive force that involves a hydrogen atom and an oxygen or a
nitrogen that are either in two different molecules or within the same
molecule
d. None of the above
e. All of the above - ANS-c. An attractive force that involves a
hydrogen atom and an oxygen or a nitrogen that are either in two
different molecules or within the same molecule
An -OH group is an _____ group
a. Carboxyl
b. Hydroxyl
c. Amino
d. Methyl
e. Ketone - ANS-b. Hydroxyl
An -COOH Group is an ____ group
a. Carboxyl
b. Hydroxyl
c. Amino
d. Methyl
e. Ketone - ANS-a. Carboxyl
Glucose dissolves in water because it
a. Ionizes
b. Is a polysaccharide
c. Is polar and forms many hydrogen bonds with the water molecules
d. Has a very reactive primary structure
e. None of the above - ANS-c. Is polar and forms many hydrogen
bonds with the water molecules
The sequence of Amino Acids is the ____ structure of proteins
, a. Primary
b. Secondary
c. Tertiary
d. Quaternary
e. All of the above - ANS-a. Primary
The R group found in amino acids consists of
a. An amine group
b. A hydroxyl group
c. A carboxyl group
d. Additional atoms
e. [a] and [c] are correct, but not [b] and [d] - ANS-d. Additional atoms
Valine has ____ carbon atoms
a. 4
b. 5
c. 6
d. 7
e. 8 - ANS-b. 5
Arginine has ____ carbon atoms
a. 4
b. 5
c. 6
d. 7
e. 8 - ANS-c. 6
Proline has ____ carbon atoms
a. 4
2026 LATEST UPDATES QUESTIONS
AND CORRECT VERIFIED ANSWERS
ALREADY GRADED A+
The constant for the ES formation, k-1 = the rate constant for ES
dissociation, and K+2 = the rate constant for product formation
a. K-1 is highly negligible compared to k+2
b. The rate of formation of ES is equal to the rate of its depletion over the
course of the reaction
c. The rate of formation of ES exceeds the rate of depletion over the
course of the reaction
d. K+2 is negligible when compared to k+1 e. The enzyme is saturated
with substrate - ANS-b. The rate of formation of ES is equal to the
rate of its depletion over the course of the reaction
In competitive inhibition, increasing the concentration substrate:
a- decreases the overall rate of reaction
b- increases the overall rate of reaction
c- is without effect
d- the observed effect depend on the inhibitor
e- competitive inhibitors do not affect the rate of the reaction - ANS-b-
increases the overall rate of reaction
A hydrogen bond is
a. A sharing of a pair of electrons between a hydrogen and an oxygen
nucleus
b. A sharing of a pair of electrons between a hydrogen nucleus and either
an oxygen or a nitrogen nucleus
,c. An attractive force that involves a hydrogen atom and an oxygen or a
nitrogen that are either in two different molecules or within the same
molecule
d. None of the above
e. All of the above - ANS-c. An attractive force that involves a
hydrogen atom and an oxygen or a nitrogen that are either in two
different molecules or within the same molecule
An -OH group is an _____ group
a. Carboxyl
b. Hydroxyl
c. Amino
d. Methyl
e. Ketone - ANS-b. Hydroxyl
An -COOH Group is an ____ group
a. Carboxyl
b. Hydroxyl
c. Amino
d. Methyl
e. Ketone - ANS-a. Carboxyl
Glucose dissolves in water because it
a. Ionizes
b. Is a polysaccharide
c. Is polar and forms many hydrogen bonds with the water molecules
d. Has a very reactive primary structure
e. None of the above - ANS-c. Is polar and forms many hydrogen
bonds with the water molecules
The sequence of Amino Acids is the ____ structure of proteins
, a. Primary
b. Secondary
c. Tertiary
d. Quaternary
e. All of the above - ANS-a. Primary
The R group found in amino acids consists of
a. An amine group
b. A hydroxyl group
c. A carboxyl group
d. Additional atoms
e. [a] and [c] are correct, but not [b] and [d] - ANS-d. Additional atoms
Valine has ____ carbon atoms
a. 4
b. 5
c. 6
d. 7
e. 8 - ANS-b. 5
Arginine has ____ carbon atoms
a. 4
b. 5
c. 6
d. 7
e. 8 - ANS-c. 6
Proline has ____ carbon atoms
a. 4
