The inner mitochondrial membrane contains

Options

A. Enzymes
B. Electron carriers
C. 70 S ribosomes
D. Both (1) & (2)

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Mitochondria:**
- Mitochondria are organelles known as the powerhouse of the cell. They have a double membrane structure: an outer membrane and an inner membrane.

2. **Identifying the Inner Mitochondrial Membrane:**
- The inner mitochondrial membrane is highly folded into structures called cristae. These folds increase the surface area for various biochemical processes.

3. **Components of the Inner Mitochondrial Membrane:**
- The inner mitochondrial membrane contains several important components:
- **Electron Transport Chain (ETC) Complexes:** These are protein complexes that facilitate the transfer of electrons through a series of reactions, ultimately leading to ATP production.
- **ATP Synthase (F0 and F1 particles):** These particles are essential for synthesizing ATP from ADP and inorganic phosphate during oxidative phosphorylation.
- **Enzymes:** Various enzymes involved in metabolic processes are embedded in or associated with the inner mitochondrial membrane.

4. **Clarifying the Presence of Ribosomes:**
- While ribosomes are present in mitochondria, they are located in the mitochondrial matrix, not on the inner mitochondrial membrane. Therefore, the inner mitochondrial membrane does not contain ribosomes.

5. **Conclusion:**
- Based on the components identified, the inner mitochondrial membrane contains electron carriers, ATP synthase (F0 and F1 particles), and enzymes, but not ribosomes.

**Final Answer:**
The inner mitochondrial membrane contains electron carriers, ATP synthase (F0 and F1 particles), and enzymes.

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