A clone of plasma cells, which produce anti bodies and memory cells are formed by the proliferation and differentiation of

Options

A. antigen presenting cell
B. T lymphocyte
C. B lymphocyte
D. macrophage

Answer

To solve the question, we need to identify which type of cell is responsible for the formation of a clone of plasma cells that produce antibodies and memory cells. Here’s a step-by-step breakdown:

### Step 1: Understand the Role of Immune Cells
- Immune cells play different roles in the immune response. The key players mentioned are antigen-presenting cells, T lymphocytes, B lymphocytes, and macrophages.

### Step 2: Identify Antigen-Presenting Cells
- Antigen-presenting cells (APCs) such as dendritic cells and macrophages present antigens to T cells, but they do not directly produce antibodies or memory cells.

### Step 3: Understand T Lymphocytes
- T lymphocytes are crucial for cell-mediated immunity. They help activate other immune cells but do not produce antibodies directly.

### Step 4: Focus on B Lymphocytes
- B lymphocytes (B cells) are responsible for humoral immunity. Upon activation, they proliferate and differentiate into two main types of cells: plasma cells and memory cells.

### Step 5: Plasma Cells and Memory Cells
- Plasma cells are the effector B cells that secrete antibodies specific to the antigen. Memory cells are long-lived cells that "remember" the antigen for faster response in future infections.

### Conclusion
- The correct answer to the question is that a clone of plasma cells and memory cells is formed by the proliferation and differentiation of **B lymphocytes**.

### Final Answer
- **B lymphocytes (B cells)** are responsible for the formation of plasma cells that produce antibodies and memory cells.

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