Which of the following enzyme has/have haem as a prosthetic group
(i) Catalase
(ii) Carboxypeptidase
(iii) Succinic dehydrogenase
(iv) Peroxidase

Options

A. (a) i only
B. (b) i and ii
C. (c) iii and iv
D. (d) i and iv

Answer

To determine which of the following enzymes has heme as a prosthetic group, we will analyze each enzyme listed in the question:

1. **Catalase**:
- Catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide into water and oxygen. It contains heme as a prosthetic group, which is crucial for its catalytic activity.

2. **Carboxypeptidase**:
- Carboxypeptidase is a digestive enzyme that removes amino acids from the carboxyl end of proteins. It does not contain heme as a prosthetic group; instead, it is a zinc-dependent enzyme.

3. **Succinic dehydrogenase**:
- Succinic dehydrogenase is involved in the citric acid cycle and is responsible for the conversion of succinate to fumarate. This enzyme does not contain heme as a prosthetic group; it typically contains flavin as a cofactor.

4. **Peroxidase**:
- Peroxidase is an enzyme that catalyzes the reduction of peroxides. Similar to catalase, peroxidase also contains heme as a prosthetic group, which is essential for its function.

Based on this analysis, the enzymes that have heme as a prosthetic group are **catalase** and **peroxidase**.

### Final Answer:
The enzymes that have heme as a prosthetic group are **(i) Catalase** and **(iv) Peroxidase**.