The following questions are based on the reaction A + B → C + D shown in Figure 8.2.

-Which of the following statements describes enzyme cooperativity?
A)A multi-enzyme complex contains all the enzymes of a metabolic pathway.
B)A product of a pathway serves as a competitive inhibitor of an early enzyme in the pathway.
C)A substrate molecule bound to an active site affects the active site of several subunits.
D)Several substrate molecules can be catalyzed by the same enzyme.
E)A substrate binds to an active site and inhibits cooperation between enzymes in a pathway.

Question

The following questions are based on the reaction A + B → C + D shown in Figure 8.2.

-Which of the following statements describes enzyme cooperativity?
A)A multi-enzyme complex contains all the enzymes of a metabolic pathway. 
B)A product of a pathway serves as a competitive inhibitor of an early enzyme in the pathway. 
C)A substrate molecule bound to an active site affects the active site of several subunits. 
D)Several substrate molecules can be catalyzed by the same enzyme. 
E)A substrate binds to an active site and inhibits cooperation between enzymes in a pathway.

Quizplus · Accepted Answer

Enzyme cooperativity occurs when a substrate molecule bound to an active site affects the active site of several subunits, causing them to change their shape and become more or less receptive to substrate binding. This results in increased or decreased activity of the enzyme complex, respectively. Choices A and B describe other forms of enzyme regulation, while choices D and E do not relate to cooperativity specifically.

The Following Questions Are Based on the Reaction a