Functional unit of Chloroplast s :-

Options

A. Stroma
B. Quantasome
C. oxysomes
D. Peroxysomes

Answer

**Step-by-Step Solution:**

1. **Identify the Chloroplast Structure**: Begin by understanding the structure of the chloroplast. Chloroplasts are organelles found in plant cells that are responsible for photosynthesis. They contain various components, including the stroma and thylakoids.

2. **Understand the Components**:
- **Stroma**: This is the colorless fluid that surrounds the thylakoids (the stacked structures within the chloroplast). While it plays a role in the photosynthesis process, it is not considered the functional unit of the chloroplast.
- **Thylakoids**: These are membrane-bound structures where the light-dependent reactions of photosynthesis occur. They are organized into stacks known as grana.

3. **Identify Functional Units**: The functional unit of the chloroplast is associated with the thylakoids. Within the thylakoid membranes, there are particles known as **quantosomes**.

4. **Define Quantosomes**: Quantosomes are particles found in the thylakoid membranes and are crucial for the photosynthesis process. They were identified as the structural and functional units of the chloroplast by researchers in 1962.

5. **Eliminate Incorrect Options**:
- **Auxosomes**: These are small rounded bodies found in the mitochondria, not chloroplasts.
- **Peroxisomes**: These are organelles involved in various metabolic processes, but they are not specific to chloroplast function.

6. **Conclusion**: Based on the analysis, the correct answer to the question "Functional unit of Chloroplast is" is **quantosome**.

**Final Answer**: The functional unit of the chloroplast is the **quantosome**.

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