Number of grana present in a chloroplast is

Options

A. 10-20
B. 20-30
C. 30-40
D. 40-60

Answer

To answer the question regarding the number of grana present in a chloroplast, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chloroplast Structure**:
- Chloroplasts are membrane-bound organelles found in plant cells. They are essential for photosynthesis.

2. **Identifying Key Components**:
- Chloroplasts have an outer membrane, an inner membrane, and an intermembrane space. Inside, they contain thylakoids, which are membrane-bound structures.

3. **Defining Thylakoids and Grana**:
- Thylakoids are arranged in stacks called grana (singular: granum). Each granum consists of several thylakoid discs stacked on top of each other.

4. **Counting Grana in Mature Chloroplasts**:
- In mature chloroplasts, the number of grana typically ranges from 40 to 60.

5. **Conclusion**:
- Therefore, the correct answer to the question about the number of grana present in a chloroplast is that there are **40 to 60 grana**.

### Final Answer:
The number of grana present in a chloroplast is **40 to 60**.

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