Maximum absorption by chlorophyll - a is seen in ( P ) .The maximum rate of photosynthesis is seen in ( Q ) . The correct world filling ( P ) and ( Q ) are

Options

A. (P) : red light and (Q) : red light
B. (P) : blue light and (Q) : blue light
C. (P) : blue light and (Q) : red light
D. (P) : red light and (Q) : blue light

Answer

To solve the question regarding the maximum absorption by chlorophyll-a and the maximum rate of photosynthesis, we can break down the problem into the following steps:

### Step-by-Step Solution:

1. **Understanding Chlorophyll-a**:
- Chlorophyll-a is the primary pigment involved in photosynthesis in plants. It absorbs light energy, which is essential for the photosynthesis process.

2. **Identifying Maximum Absorption**:
- Research indicates that chlorophyll-a has maximum absorption in the blue light spectrum. This is crucial because it determines the color of light that plants utilize most effectively for photosynthesis.

3. **Determining Maximum Rate of Photosynthesis**:
- While chlorophyll-a absorbs maximum light in the blue spectrum, the overall rate of photosynthesis is highest when plants are exposed to red light. This is due to the fact that red light provides the energy needed for the photosynthesis process to occur at its peak efficiency.

4. **Filling in the Blanks**:
- Based on the above information:
- (P) for maximum absorption by chlorophyll-a is **blue light**.
- (Q) for maximum rate of photosynthesis is **red light**.

5. **Final Answer**:
- Therefore, the correct word fillings are:
- (P) = Blue light
- (Q) = Red light