Blue green algae contain phycobilin. Which one is blue in colour ?

Options

A. Phycocyanin
B. Phycoerythrin
C. Phycocolloid
D. none of the above

Answer

To solve the question about which phycobilin in blue-green algae is blue in color, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Phycobilins**:
- Phycobilins are light-harvesting pigments found in cyanobacteria (blue-green algae). They play a crucial role in photosynthesis by capturing light energy.

2. **Identify Types of Phycobilins**:
- The major types of phycobilins include phycocyanin and phycoerythrin.

3. **Determine the Color of Each Type**:
- Phycocyanin is known to be blue in color.
- Phycoerythrin, on the other hand, is red in color.

4. **Analyze the Options Given**:
- The options provided are:
- A) Phycocyanin
- B) Phycoerythrin
- C) Phycocolite
- D) None of the above

5. **Select the Correct Answer**:
- Since phycocyanin is the blue pigment, the correct answer to the question "Which one is blue in color?" is option A) Phycocyanin.

### Final Answer:
The blue pigment in blue-green algae (cyanobacteria) is **phycocyanin**.

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