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 and the maximum rate of photosynthesis, we can break it down into the following steps:

### Step 1: Understand Chlorophyll Absorption
Chlorophyll is the green pigment found in plants that plays a crucial role in photosynthesis. It absorbs light energy, which is necessary for the process of converting carbon dioxide and water into glucose and oxygen.

**Hint:** Remember that chlorophyll absorbs light primarily in specific wavelengths.

### Step 2: Identify the Wavelengths of Light
Research indicates that chlorophyll-a, the primary pigment involved in photosynthesis, has its maximum absorption in the blue and red regions of the light spectrum. Specifically, chlorophyll-a absorbs light most effectively in the blue light range (around 430-450 nm).

**Hint:** Focus on the colors of light that chlorophyll absorbs best.

### Step 3: Determine the Maximum Rate of Photosynthesis
The rate of photosynthesis is influenced by the light intensity and quality. Studies have shown that the maximum rate of photosynthesis occurs when plants are exposed to red light (around 640-680 nm). This is because red light is very effective in driving the photosynthetic process.

**Hint:** Think about which color of light provides the most energy for the photosynthesis process.

### Step 4: Fill in the Blanks
Based on the information gathered:
- For (P), which refers to maximum absorption by chlorophyll-a, the correct answer is **blue light**.
- For (Q), which refers to the maximum rate of photosynthesis, the correct answer is **red light**.

### Final Answer
Thus, the correct word filling for (P) and (Q) are:
- (P) = Blue light
- (Q) = Red light

### Summary
- Maximum absorption by chlorophyll-a is seen in **blue light** (P).
- The maximum rate of photosynthesis is seen in **red light** (Q).