Quantosomes occur in

Options

A. Chloroplasts/Grana
B. Mitochondria
C. Nucleus
D. Lysosmes.

Answer

**Step-by-Step Solution:**

1. **Understanding Quantosomes**: Quantosomes are small particles that are found in the thylakoid membrane of chloroplasts. They play a crucial role in the process of photosynthesis.

2. **Composition of Quantosomes**: These particles are composed of lipids, proteins, various photosynthetic pigments, and redox carriers. This composition is essential for their function in photosynthesis.

3. **Sizes of Quantosomes**: Quantosomes occur in two sizes:
- Smaller quantosomes are associated with Photosystem I.
- Larger quantosomes are associated with Photosystem II.

4. **Identifying the Correct Option**: Given the options:
- **Chloroplast or Grana**: This is the correct answer, as quantosomes are found in the chloroplasts, specifically in the thylakoid membranes.
- **Mitochondria**: Incorrect, as mitochondria are involved in ATP production, not photosynthesis.
- **Nucleus**: Incorrect, as the nucleus contains genetic material and does not contain quantosomes.
- **Lysosomes**: Incorrect, as lysosomes are involved in digestion and waste removal in cells.

5. **Conclusion**: Therefore, the correct answer is that quantosomes occur in the chloroplasts.

**Final Answer**: Quantosomes occur in chloroplasts.

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