In insulin molecule there are two chains 'A' and 'B', 'A' contain 'X' - amino acids and 'B' contain 'Y' amino acids. The value of X and Y are

Options

A. 21, 31
B. 21, 30
C. 28, 36
D. 32, 34

Answer

To solve the question regarding the number of amino acids in the insulin molecule, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Insulin**:
- Insulin is a protein hormone composed of two chains, referred to as Chain A and Chain B.

2. **Identify the Total Number of Amino Acids**:
- It is known that the total number of amino acids in an insulin molecule is 51.

3. **Determine the Distribution of Amino Acids**:
- The two chains have specific numbers of amino acids. Chain A contains a certain number of amino acids (denoted as X) and Chain B contains another number (denoted as Y).

4. **Use the Known Values**:
- From the information provided, Chain A (X) contains 21 amino acids and Chain B (Y) contains 30 amino acids.

5. **Final Values**:
- Therefore, the values are:
- X = 21 (for Chain A)
- Y = 30 (for Chain B)

### Conclusion:
The values of X and Y are:
- X = 21
- Y = 30