Phycobilins absorb light of wavelength

Options

A. 670-700 nm
B. 610-650 nm
C. 500-650 nm
D. 420-520 nm

Answer

### Step-by-Step Solution:

1. **Understanding Phycobilins**:
- Phycobilins are water-soluble pigments primarily found in red algae and cyanobacteria. They play a crucial role in photosynthesis by capturing light energy.

2. **Role of Phycobilins**:
- These pigments are classified as accessory pigments. They assist in the process of photosynthesis by absorbing light and transferring the energy to chlorophyll, the primary pigment involved in photosynthesis.

3. **Types of Light Absorption**:
- In photosynthetic organisms, different pigments absorb light at various wavelengths. The main types of pigments include:
- **Chlorophylls**: Primary pigments that absorb light mainly in the blue and red wavelengths.
- **Carotenoids**: Accessory pigments that absorb light in the blue and green wavelengths.
- **Phycobilins**: Accessory pigments that absorb light in the green to orange wavelengths.

4. **Identifying the Wavelength Range**:
- The question asks specifically about the wavelength range that phycobilins absorb. Based on scientific knowledge, phycobilins absorb light in the range of **500 to 650 nm**.

5. **Conclusion**:
- Therefore, the correct answer to the question "Phycobilins absorb light of wavelength" is **option C: 500 to 650 nm**.