Zinc acts as cofactor for the following enzyme

Options

A. Glutamine synthetase
B. Carboxy peptidase
C. Malate dehydrogenase
D. Nitrate reductase

Answer

**Step-by-Step Solution:**

1. **Understanding Cofactors:**
- Cofactors are non-protein chemical compounds that are required for the biological activity of some enzymes. They can be metal ions or organic molecules.

2. **Identifying Zinc as a Cofactor:**
- Zinc is a common metal ion that serves as a cofactor for various enzymes. It plays a crucial role in enzyme structure and function.

3. **Finding Enzymes that Use Zinc:**
- One of the well-known enzymes that require zinc as a cofactor is **malate dehydrogenase**. This enzyme is involved in the citric acid cycle (Krebs cycle) and is important for energy production in cells.

4. **Conclusion:**
- Therefore, the enzyme that zinc acts as a cofactor for is **malate dehydrogenase**.

**Final Answer:**
Zinc acts as a cofactor for the enzyme **malate dehydrogenase**.

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