Thylakoids possess photosynthetic units called

Options

A. Quantasomes
B. Glyoxysomes
C. Polysomes
D. Ribosomes.

Answer

### Step-by-Step Solution:

1. **Understanding Thylakoids**:
- Thylakoids are membrane-bound structures found in chloroplasts. They are essential for photosynthesis, specifically for the light-dependent reactions.

2. **Identifying Photosynthetic Units**:
- The question asks about the photosynthetic units located within thylakoids. These units are crucial for capturing light energy and converting it into chemical energy during photosynthesis.

3. **Evaluating the Options**:
- **Option 1: Quantosomes**: These are particles found in the thylakoid membrane of chloroplasts and are involved in the photosynthetic process. They are indeed the photosynthetic units that facilitate the light-dependent reactions.
- **Option 2: Glyoxisomes**: These are specialized peroxisomes found in plants, primarily involved in fat storage in germinating seeds. They are not related to photosynthesis.
- **Option 3: Polysomes**: Also known as polyribosomes, these consist of multiple ribosomes and are involved in protein synthesis. They do not play a direct role in photosynthesis.
- **Option 4: Ribosomes**: These are the sites of protein synthesis in cells and are not involved in the photosynthetic process.

4. **Conclusion**:
- Based on the evaluation of the options, the correct answer is **Quantosomes**, as they are the photosynthetic units present in thylakoids.

### Final Answer:
Thylakoids possess photosynthetic units called **Quantosomes**.

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