The activity of the enzymes pepsin is maximum at the pH value of

Options

A. 1.5
B. 6.5
C. 8.5
D. 10.5

Explanation

To determine the pH value at which the enzyme pepsin exhibits maximum activity, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Pepsin**:
- Pepsin is a digestive enzyme that breaks down proteins into peptides. It is primarily active in the stomach, where the environment is highly acidic.

2. **Identify the Optimal pH for Pepsin**:
- Enzymes have specific pH ranges at which they function optimally. For pepsin, this optimal pH is in the acidic range.

3. **Consider the pH Scale**:
- The pH scale ranges from 0 to 14, where values below 7 are considered acidic, and values above 7 are basic. A pH of 7 is neutral.

4. **Analyze Given pH Values**:
- The question provides several pH values: 1.5, 6.5, 8.5, and 10.5.
- Among these, only 1.5 is acidic, while the others (6.5, 8.5, and 10.5) are either neutral or basic.

5. **Conclude the Optimal pH for Pepsin**:
- Since pepsin is most active in acidic conditions, the pH value at which pepsin exhibits maximum activity is 1.5.

### Final Answer:
The activity of the enzyme pepsin is maximum at a pH value of **1.5**.

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