Allophycocyanin is found in

Options

A. Chlorophyceae
B. Rhodophyceae
C. Both 1 and 2
D. All marine algae

Answer

To solve the question "Allophycocyanin is found in," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Allophycocyanin**:
- Allophycocyanin is a type of protein that belongs to the family of phycobiliproteins.

2. **Identifying the Source**:
- Phycobiliproteins are primarily found in certain types of algae. Specifically, they are associated with red algae.

3. **Classifying Algae**:
- Red algae are classified under the group known as Rhodophyceae.

4. **Analyzing the Options**:
- Given the options:
- 1. Chlorophyceae (green algae)
- 2. Rhodophyceae (red algae)
- 3. Both 1 and 2
- 4. All marine algae
- Since Allophycocyanin is a protein found specifically in red algae, the correct classification is Rhodophyceae.

5. **Conclusion**:
- Therefore, the answer to the question is that Allophycocyanin is found in Rhodophyceae.

### Final Answer:
Allophycocyanin is found in Rhodophyceae.

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