The packet of thylakoids in a chloroplast is called

Options

A. Free channels
B. Granum
C. Stroma thylakoid
D. Photosynthetic thylakoid

Answer

To answer the question "The packet of thylakoids in a chloroplast is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Chloroplasts**:
- Chloroplasts are organelles found in plant cells and are responsible for photosynthesis. They contain various structures, including thylakoids, stroma, and granum.

2. **Identify Thylakoids**:
- Thylakoids are membrane-bound compartments inside chloroplasts. They are flat, disc-shaped structures that contain chlorophyll and are involved in the light-dependent reactions of photosynthesis.

3. **Define Granum**:
- A granum (plural: grana) is a stack of thylakoids. Thylakoids are organized into these stacks to increase the surface area for light absorption and to facilitate the photosynthetic process.

4. **Analyze the Options**:
- a. Free channels: This does not refer to thylakoids.
- b. Granum: This is the correct term for a stack of thylakoids.
- c. Stroma thylakoids: While this refers to thylakoids that are not in stacks, it does not answer the question about the packet of thylakoids.
- d. Photosynthetic thylakoids: This is a general term and does not specifically refer to the structure in question.

5. **Conclude the Answer**:
- Based on the definitions and the structure of chloroplasts, the correct answer is **b. granum**.

### Final Answer:
The packet of thylakoids in a chloroplast is called **granum**.

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