The site of production of ADA in the body is

Options

A. bone marrow
B. lymphocytes
C. blood plasma
D. monocytes

Answer

To determine the site of production of ADA (adenosine deaminase) in the body, we can follow these steps:

### Step 1: Understand what ADA is
- ADA stands for adenosine deaminase, which is an enzyme involved in the purine salvage pathway. It plays a crucial role in the metabolism of nucleotides.

**Hint:** Remember that enzymes typically have names ending in "-ase."

### Step 2: Recognize the importance of ADA
- ADA is essential for the functioning of the immune system. A deficiency in this enzyme can lead to severe combined immunodeficiency (SCID), a serious condition that affects the immune system.

**Hint:** Think about diseases related to enzyme deficiencies to understand their significance.

### Step 3: Identify potential sites of production
- The options provided are:
1. Bone marrow
2. Lymphocytes
3. Blood plasma
4. Monocytes

**Hint:** Consider where immune cells are produced and function in the body.

### Step 4: Analyze the options
- Bone marrow is the site of production for many blood cells, including lymphocytes, but it is not the direct site of ADA production.
- Lymphocytes are a type of white blood cell (WBC) that are crucial for the immune response and are known to produce ADA.
- Blood plasma does not produce enzymes; it is the liquid component of blood.
- Monocytes are another type of WBC, but they do not specifically produce ADA.

**Hint:** Focus on the specific type of cells that are directly involved in the production of ADA.

### Step 5: Conclude the correct answer
- Based on the analysis, the correct answer is that ADA is produced in lymphocytes.

**Final Answer:** The site of production of ADA in the body is **lymphocytes**.