Which of the following events does not occur in photosynthesis ?

Options

A. conversion of light energy into chemical energy
B. reduction of carbon dioxide to carbohydrates
C. oxidation of carbon to carbon dioxide
D. absorption of light energy by chlorophyll

Answer

To determine which event does not occur in photosynthesis, we need to analyze each of the given options:

1. **Conversion of light energy into chemical energy**: This is a fundamental aspect of photosynthesis. Plants absorb light energy from the sun, which is then converted into chemical energy stored in glucose. This event does occur in photosynthesis.

2. **Reduction of carbon dioxide to carbohydrates**: During photosynthesis, carbon dioxide is indeed reduced to form carbohydrates (like glucose). This process is essential for the synthesis of food in plants. Therefore, this event also occurs in photosynthesis.

3. **Oxidation of carbon to carbon dioxide**: This statement is incorrect in the context of photosynthesis. In photosynthesis, carbon dioxide is used to produce glucose, and there is no oxidation of carbon to carbon dioxide occurring in this process. Instead, carbon is fixed from carbon dioxide to form carbohydrates.

4. **Absorption of light energy by chlorophyll**: Chlorophyll is the pigment in plants that absorbs light energy, which is crucial for photosynthesis. This event does occur in photosynthesis.

After analyzing all the options, the event that does not occur in photosynthesis is:

**Answer: Oxidation of carbon to carbon dioxide (Option 3)**.

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