Question

Whaat is the effect temprature and ph on enzyme catalysis

Answer 1

Like most chemical reactions, the rate of an enzyme-catalyzed reaction increases as the temperature is raised. A ten degree Centigrade rise in temperature will increase the activity of most enzymes by 50 to 100%.

Answer 2

Answer :-

Most of the enzymes tend to remain in an active state only over a narrow pH range and have an optimal pH level, at which the rate of the chemical reaction is the fastest.

The above phenomenon can be understood in a better manner through the following informations :-

• The optimal pH level for the enzymes in the body of Human beings, lies between the range of 6 to 8.

• Certain digestive enzymes in the body of an organism prefer a distinctly acidic or a distinctly alkaline medium for carrying out their functions.

• Pepsin, a protien digestive enzyme secreted by the stomach, works best at an optimal pH of level 2 (highly acidic medium).

• The enzyme activity declines gradually on either sides of the optimal pH level.

• The change in pH levels leads to an alteration in the shape of the enzymes, including the shape of their active sites.

• Majority of the enzymes become inactive, and usually become irreversibly denatured, when the medium of the chemical reaction is made either very acidic or very alkaline.