Inner mitochondrial membrane possesses enzymes

Options

A. ATPase, succinate dehydrogenase cytochrome oxidase .
B. Malate dehydrogenase, citrate synthetase
C. Diphosphokinase and cyclase
D. citrate synthetase

Answer

### Step-by-Step Solution:

1. **Understanding Mitochondria**:
- Mitochondria are double-membraned organelles known as the powerhouse of the cell, present in all eukaryotic cells. They play a crucial role in energy production through aerobic respiration.

**Hint**: Remember that mitochondria are often referred to as the powerhouse of the cell due to their role in ATP production.

2. **Identifying the Inner Mitochondrial Membrane**:
- The inner mitochondrial membrane is the site of the electron transport chain (ETC) and is involved in aerobic respiration. It contains various respiratory chain enzymes.

**Hint**: Focus on the functions of the inner mitochondrial membrane, particularly in relation to the electron transport chain.

3. **Analyzing the Options**:
- **Option A**: ATPase, succinate dehydrogenase, and cytochrome oxidase.
- **ATPase**: Also known as ATP synthase, is embedded in the inner mitochondrial membrane and synthesizes ATP.
- **Succinate Dehydrogenase**: Part of respiratory complex II, converts succinate to fumarate in the citric acid cycle.
- **Cytochrome Oxidase**: Present in the inner membrane and plays a role in the electron transport chain.

- **Option B**: Malate dehydrogenase, citrate synthetase, diphosphokinase, and cyclase.
- **Malate Dehydrogenase**: Located in the mitochondrial cytoplasm, not the inner membrane.
- **Citrate Synthetase**: Found in the mitochondrial matrix, not the inner membrane.
- **Diphosphokinase**: Present outside the mitochondrial matrix.
- **Cyclase**: Located within the plasma membrane.

- **Option C**: Citrate synthetase (repeated from option B).

4. **Conclusion**:
- After analyzing all options, it is clear that **Option A** (ATPase, succinate dehydrogenase, and cytochrome oxidase) contains enzymes that are present in the inner mitochondrial membrane.

**Final Answer**: The correct answer is **Option A**: ATPase, succinate dehydrogenase, and cytochrome oxidase.