Define warburg effect ?

Explanation

### Step-by-Step Solution:

1. **Definition of the Warburg Effect**: The Warburg effect refers to the phenomenon where an increase in the concentration of oxygen leads to a decrease in the rate of photosynthesis in plants.

2. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, producing food in the form of glucose and releasing oxygen as a byproduct.

3. **Photosynthesis Reactions**: Photosynthesis consists of two main types of reactions:
- **Light Reactions**: These occur in the presence of light and involve the synthesis of ATP and NADPH.
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