Chloroplasts are agranal in

Options

A. Algae
B. Bundle sheath cells of `C_(4)` plants
C. Mesophyll cells of `C_(4)` plants
D. Both A and B.

Answer

**Step-by-Step Solution:**

1. **Understanding Chloroplast Structure**: Chloroplasts are the organelles in plant cells where photosynthesis occurs. They contain thylakoids, which can be stacked to form structures called grana. The presence or absence of grana is important for understanding different types of chloroplasts.

2. **Identifying Types of Cells**: The question asks about chloroplasts that are agranal (lacking grana). We need to identify which types of cells or organisms have agranal chloroplasts.

3. **Analyzing the Options**:
- **Option A: Algae**: Some types of algae have chloroplasts that are agranal. Therefore, algae can be considered as having agranal chloroplasts.
- **Option B: Bundle Sheath Cells of C4 Plants**: These cells surround the vascular bundles in C4 plants and are known to have chloroplasts that lack grana. They are specifically adapted for the C4 photosynthetic pathway.
- **Option C: Mesophyll Cells of C4 Plants**: These cells contain chloroplasts that do have grana, so they do not fit the criteria of being agranal.

4. **Conclusion**: Since both algae and bundle sheath cells of C4 plants have agranal chloroplasts, the correct answer is that chloroplasts are agranal in both A (algae) and B (bundle sheath cells of C4 plants).

5. **Final Answer**: The correct option is "both A and B."

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