Question

Which of the following is correct?

• A. Enzymatic activity is maximum at its optimum pH and temperature
• B. Enzymatic activity declines both below and above the optimum value
• C. High temperature destroys enzymatic activity
• D. All of these

Answer 1

The correct option is D All of these

Most enzymes are proteins and get denatured at high temperatures. The denaturation causes loss of enzymatic activity. They work efficiently at optimum temperature and pH. The optimum temperature of most enzymes is around 0 to ${40}^{\circ }C$. The optimum pH varies for every enzyme. For example - the enzyme pepsin secreted in the human stomach cannot work efficiently in the small intestine as pepsin works only at low acidic acidic pH. Any deviation from the optimum pH and temperature causes a decline in their activity.