If an enzyme's optimal temperature is 37°C, then the enzyme ____.
A) has a cofactor
B) is likely to catalyze the reaction at the same rate at 30°C
C) will probably be inactive at a pH below 4.5
D) will completely denature at 38°C
E) activity will drop at temperatures above 37°C and likely be eliminated by 60°C

Question

Quizplus · Accepted Answer

Enzymes have optimal temperatures at which they function most efficiently. Above this temperature, their activity decreases due to denaturation or loss of three-dimensional structure, which is critical for their catalytic activity. While not all enzymes will be completely inactive or denatured slightly above their optimal temperature, a significant drop in activity is expected as the temperature increases much beyond the optimal point, with many enzymes being denatured by 60°C.

If an Enzyme's Optimal Temperature Is 37°C, Then the Enzyme