As temperature increases the rate of enzyme activity increases until it reaches approximately 37 degrees celsius. as temperature increases beyond 37 degrees celsius, the enzyme activity decreases. what causes this decrease in enzyme activity?

a. the enzyme denatures
b. the temperature destroys the substrate
c. the energy reaches its maximum input
d. all of the above

Answer:

The enzyme activity decreases due to the denaturation of the enzymes.  

Explanation:

Enzymes are built with proteins. Enzymes catalyze a reaction by binding to the substrate molecule in its active site. As temperature increases the rate of the enzyme activity increases because kinetic energy of the molecules get increases.

But when the temperature crosses approximately 37-40 degrees Celsius the structure of enzyme denatures due to breakage of its intra- and intermolecular bonds. The active parts of an enzyme changes and it can no longer bind to its substrate hence the enzyme activity decreases.