Which photosynthetic pigment has maximum absorption peak in red range of visible light?

Options

A. Chlorophyll a
B. Chlorophyll b
C. Phycoerythrin
D. Xanthophyll

Answer

To answer the question, "Which photosynthetic pigment has maximum absorption peak in the red range of visible light?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify Photosynthetic Pigments**: Understand that there are several types of photosynthetic pigments, including chlorophyll-a, chlorophyll-b, phycoerythrin, and xanthophylls.

2. **Focus on Chlorophyll-a**: Recognize that chlorophyll-a is the primary pigment involved in photosynthesis and is known for its significant absorption peaks in specific light ranges.

3. **Examine Absorption Peaks**: Research the absorption spectra of chlorophyll-a. It is known to have strong absorption peaks in both the blue and red regions of the visible light spectrum.

4. **Compare with Other Pigments**:
- **Chlorophyll-b**: While chlorophyll-b also absorbs light in the red range, its peak is lower than that of chlorophyll-a.
- **Phycoerythrin**: This pigment, found in red algae, absorbs light in the red spectrum but again does not reach the absorption peak of chlorophyll-a.
- **Xanthophylls**: These pigments do not absorb red light effectively and are more associated with the blue light region.

5. **Conclusion**: Based on the absorption characteristics of these pigments, it is clear that chlorophyll-a has the maximum absorption peak in the red range of visible light.

### Final Answer:
The photosynthetic pigment that has the maximum absorption peak in the red range of visible light is **Chlorophyll-a**.

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