Which one of the following is wrong in relation to photorespiration

Options

A. It occurs in chloroplasts.
B. It occurs in daytime only.
C. It is a characteristic of `C_(4)` plants
D. It is a characteristic of `C_(3)` plants.

Answer

To determine which statement about photorespiration is incorrect, let's analyze each option step by step.

### Step 1: Understand Photorespiration
Photorespiration is a process that occurs in plants where the enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco) reacts with oxygen instead of carbon dioxide, leading to the production of a two-carbon compound instead of the three-carbon compound typically produced during photosynthesis. This process is also known as C2 photosynthesis.

### Step 2: Analyze Each Option
1. **It occurs in chloroplasts.**
- This statement is **correct**. Photorespiration takes place in the chloroplasts of plant cells.

2. **It occurs in daytime only.**
- This statement is also **correct**. Photorespiration primarily occurs during the day when light is available for photosynthesis.

3. **It is a characteristic of C4 plants.**
- This statement is **incorrect**. Photorespiration is not a characteristic of C4 plants. C4 plants have a specialized anatomy (Kranz anatomy) that minimizes photorespiration by concentrating carbon dioxide around rubisco.

4. **It is a characteristic of C3 plants.**
- This statement is **correct**. Photorespiration is a characteristic of C3 plants, where rubisco can react with oxygen, especially under conditions of low carbon dioxide.

### Conclusion
The wrong statement in relation to photorespiration is: **"It is a characteristic of C4 plants."**