Question

The graph shows how the activity of an enzyme changes at different temperatures. Which statement best describes what happens to the enzyme when the temperature of the reaction increases to 63°C?
A
The enzyme is used up and the reaction reverses.

B
The enzyme begins to decrease the rate of the reaction.

C
The enzyme continues to increase the rate of the reaction.

D
The enzyme changes shape and can no longer speed up the reaction.

Answer 1

D. the enzyme changes shape and can no longer speed up the reaction.

Answer 2

Answer

D..The enzyme changes shape and can no longer speed up the reaction.

Explanation:

We are a graph which shows the activity of an enzyme changes at different temperatures.

We have to find that which statement describe what happens to the reaction increases to 63 degrees.

We know that enzymes are biological catalyst and made from  proteins .

It does not change in the reaction.

Catalyst increase the rate of reaction but do not  any change in  the reaction.

Therefore , when temperature increase then rate of reaction increases upto optimized level and then decreases when temperature increases.

Hence,option D is true.