Question

multiple choice question
most enzymes only function in a narrow range of temperatures and have an optimum temperature at which they work best. why?
o at very low and very high temperatures, the δg of the reaction catalyzed by an enzyme changes
o lower temperatures prevent the formation of the substrate - enzyme complex, while higher temperatures can denature the enzyme
o at lower temperatures substrates diffuse very slowly, so they cannot reach the enzyme easily, while at higher temperatures, substrates diffuse away from the enzyme too quickly.
need help? review these concept resources.

Explanation:

Enzymes are proteins and their function depends on their structure. Low temperatures slow down molecular motion, preventing the formation of the substrate - enzyme complex. High temperatures can denature the enzyme, changing its three - dimensional structure and thus its function.

Answer:

Lower temperatures prevent the formation of the substrate - enzyme complex, while higher temperatures can denature the enzyme.