Each antibody is made up of

Options

A. Two peptide chains
B. Three peptide chains
C. Four peptide chains
D. Six peptide chains

Answer

**Step-by-Step Solution:**

1. **Understanding Antibodies**: Antibodies are proteins produced by lymphocytes (B and T cells) as part of the immune response. They are also known as immunoglobulins.

2. **Structure of Antibodies**: Antibodies have a characteristic Y-shaped structure. This structure is composed of different chains.

3. **Identifying the Chains**: Each antibody consists of two types of peptide chains:
- **Light Chains**: There are two light chains in each antibody.
- **Heavy Chains**: There are also two heavy chains in each antibody.

4. **Counting the Chains**: When we count the total number of peptide chains in an antibody:
- 2 Light Chains + 2 Heavy Chains = 4 Peptide Chains

5. **Conclusion**: Therefore, each antibody is made up of **four peptide chains**.

**Final Answer**: Each antibody is made up of **four peptide chains**.

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