22.) When a protein forms from amino acids, the following changes apply:
a. +D H, -D S, +D G
b. +D H, -D S, -D G
c. +D H, +D S, +D G
d. -D H, -D S, +D G
e. -D H, +D S, +D G
24.) Why is ATP an important molecule in metabolism?
a. It has high energy phosphate bonds
b. Its phosphate bonds are easily broken and formed
c. Its hydrolysis is endergonic
d. It is readily obtained from an organism's environment
e. It is extremely stable
Zinc, an essential trace element, is represented in the active site of the enzyme carboxypeptidase. The zic most likely functions as an
a) coenzyme dervied fromm a vitamin
b) noncompetitive inhibitor of the enzyme.
c) cofactor necessary for enzyme activity.
d) competitive inhibitor of the enzyme
e) allosteric activator of the enzyme.
Figure 8.2
29) Which of the following terms best describes the reaction?
A) endergonic
B) exergonic
C) anabolic
D) allosteric
E) nonspontaneous
30) Which of the following represents the ΔG of the reaction?
A) a
B) b
C) c
D) d
E) e
31) Which of the following bests describes the reaction?
A) negative ΔG, spontaneous
B) positive ΔG, nonspontaneous
C) positive ΔG, exergonic
D) negative ΔG, endergonic
E) ΔG of zero, chemical equilibrium
32) Which of the following represents the activation energy required for the enzyme-catalyzed reaction?
A) a
B) b
C) c
D) d
E) e
33) Which of the following represents the activation energy required for a noncatalyzed reaction?
A) a
B) b
C) c
D) d
E) e
The next questions are based on the following information.
A series of enzymes catalyze the reaction X→Y→Z→A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.
34) What is substance X?
A) a coenzyme
B) an allosteric inhibitor
C) a substrate
D) an intermediate
E) the product
35) The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is known as
A) metabolic inhibition.
B) feedback inhibition.
C) allosteric inhibition.
D) noncooperative inhibition.
E) reversible inhibition.
a. +D H, -D S, +D G
b. +D H, -D S, -D G
c. +D H, +D S, +D G
d. -D H, -D S, +D G
e. -D H, +D S, +D G
24.) Why is ATP an important molecule in metabolism?
a. It has high energy phosphate bonds
b. Its phosphate bonds are easily broken and formed
c. Its hydrolysis is endergonic
d. It is readily obtained from an organism's environment
e. It is extremely stable
Zinc, an essential trace element, is represented in the active site of the enzyme carboxypeptidase. The zic most likely functions as an
a) coenzyme dervied fromm a vitamin
b) noncompetitive inhibitor of the enzyme.
c) cofactor necessary for enzyme activity.
d) competitive inhibitor of the enzyme
e) allosteric activator of the enzyme.
Figure 8.2
29) Which of the following terms best describes the reaction?
A) endergonic
B) exergonic
C) anabolic
D) allosteric
E) nonspontaneous
30) Which of the following represents the ΔG of the reaction?
A) a
B) b
C) c
D) d
E) e
31) Which of the following bests describes the reaction?
A) negative ΔG, spontaneous
B) positive ΔG, nonspontaneous
C) positive ΔG, exergonic
D) negative ΔG, endergonic
E) ΔG of zero, chemical equilibrium
32) Which of the following represents the activation energy required for the enzyme-catalyzed reaction?
A) a
B) b
C) c
D) d
E) e
33) Which of the following represents the activation energy required for a noncatalyzed reaction?
A) a
B) b
C) c
D) d
E) e
The next questions are based on the following information.
A series of enzymes catalyze the reaction X→Y→Z→A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.
34) What is substance X?
A) a coenzyme
B) an allosteric inhibitor
C) a substrate
D) an intermediate
E) the product
35) The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is known as
A) metabolic inhibition.
B) feedback inhibition.
C) allosteric inhibition.
D) noncooperative inhibition.
E) reversible inhibition.