The model shows the relation between the reaction velocity of an enzyme and temperature.

Which of these is a description of the relation?

A) Reaction velocity decreases with an increase in temperature.

B) Reaction velocity always increases with increase in temperature.

C) Reaction velocity remains constant with an increase in temperature.

D) Reaction velocity increases up to a certain temperature before decreasing.

D

Explanation:

From the graph, it is observed that the reaction velocity increases up to a certain temperature before decreasing. Reaction velocity is highest at 37° C and then it decreases again over time.

The corect answer is D) Reaction velocity inceases upto a certain level before decreasing

Explanation:

Reaction rate is directly proportional to the reaction temperature. If the temperature is increased the reaction rate increases and reaction rate decreases with fall in temperature.

Increase in temperature increases the entropy or randomness of the system in which the reaction is occurring. As a result the movement of reactant molecules also increases with an increase in the collision among reactant molecules. Thus reaction rate increases with increase in temperature.

But this is true for increase in temperature upto a certain after that increase in temperature decreases the reaction rate.