Photorespiration in low light intensity in `C _3` plants is

Options

A. high
B. negligible
C. moderate
D. very high

Answer

To solve the question regarding photorespiration in low light intensity in C3 plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Photorespiration**: Photorespiration is a process that occurs in plants, particularly C3 plants, when the enzyme RuBisCO reacts with oxygen instead of carbon dioxide. This process can lead to a loss of fixed carbon and is generally considered wasteful.

2. **Identify Conditions for Photorespiration**: It is important to note that photorespiration is favored under certain conditions:
- High light intensity
- High temperature
- High levels of oxygen

3. **Analyze Low Light Intensity**: In low light intensity conditions, the rate of photosynthesis is reduced. Since photosynthesis produces the oxygen that can lead to photorespiration, lower light intensity means less oxygen is produced.

4. **Conclusion on Photorespiration**: Given that photorespiration requires high light intensity to occur significantly, in low light conditions, the process of photorespiration would be negligible. Therefore, the answer to the question is that photorespiration in low light intensity in C3 plants is negligible.

5. **Final Answer**: The correct option is **B: negligible**.