Which enzyme is most abundantly found in RBC ?

Options

A. Carbonic anhydrase
B. Hemoglobin
C. Albumin
D. Thrombinase

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the enzyme that is most abundantly found in red blood cells (RBCs).

2. **Analyzing the Options**: We need to consider different enzymes and proteins that could be present in RBCs. The options mentioned include thrombinase, albumin, hemoglobin, and carbonic anhydrase.

3. **Evaluating Thrombinase**: Thrombinase is involved in the blood clotting process and is derived from prothrombin, which is produced in the liver. Since thrombinase is not found in RBCs, it can be eliminated as an option.

4. **Evaluating Albumin**: Albumin is a protein synthesized by the liver and plays a role in maintaining osmotic pressure in the blood. It is not found in RBCs, so this option can also be eliminated.

5. **Evaluating Hemoglobin**: Hemoglobin is a protein found in RBCs that carries oxygen. However, it is not classified as an enzyme, so it does not fit the criteria of the question.

6. **Evaluating Carbonic Anhydrase**: Carbonic anhydrase is an enzyme that catalyzes the conversion of carbon dioxide and water into carbonic acid (H2CO3) and vice versa. It is found in various tissues, including the gastric mucosa and renal tubules, but it is most abundantly found in RBCs. This makes carbonic anhydrase the correct answer.

7. **Conclusion**: The enzyme that is most abundantly found in red blood cells is carbonic anhydrase. It plays a crucial role in the transport of carbon dioxide in the blood.

**Final Answer**: Carbonic anhydrase.

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