A single thylakoid per granules is found in the chloroplast of

Options

A. red algae
B. green algae
C. brwon algae
D. yellow algae

Answer

To solve the question regarding which type of algae has a single thylakoid per granule in their chloroplasts, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Thylakoids and Granules**:
- Thylakoids are membrane-bound structures within chloroplasts where the light-dependent reactions of photosynthesis occur.
- Granules refer to stacks of thylakoids, known as grana.

2. **Identifying Types of Algae**:
- The question provides four options: red algae, green algae, brown algae, and yellow algae.

3. **Analyzing Red Algae (Rhodophyceae)**:
- Red algae are known to have chloroplasts called rhodoplasts, which contain red pigments (phycobilins).
- They possess a unique structure where the thylakoids are organized in a way that prevents stacking, leading to a configuration where there is a single granule per chloroplast.

4. **Comparing with Other Algae**:
- Green algae typically have multiple thylakoids stacked in grana.
- Brown algae also have multiple thylakoids and are known for their complex structures.
- Yellow algae, like the others, do not exhibit the single thylakoid per granule structure.

5. **Conclusion**:
- Based on the analysis, the correct answer is that a single thylakoid per granule is found in the chloroplasts of red algae.

### Final Answer:
The correct answer is **red algae**.