Which one of the following would not limit photosynthesis or not be a limiting factor photosynthesis ?

Options

A. 1)Light
B. 2)`CO_2`
C. 3)Chlorophyll
D. 4)Oxygen

Answer

To determine which factor does not limit photosynthesis, we can analyze each option provided in the question:

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy in the form of glucose, using carbon dioxide and water. Oxygen is released as a byproduct.

2. **Identifying the Options**:
- **Option 1: Light** - Light is essential for photosynthesis as it provides the energy needed for the process. Therefore, it is a limiting factor.
- **Option 2: Carbon Dioxide (CO2)** - Carbon dioxide is one of the raw materials required for photosynthesis. A low concentration of CO2 can limit the rate of photosynthesis, making it a limiting factor.
- **Option 3: Chlorophyll** - Chlorophyll is the pigment in plants that captures light energy. If chlorophyll is absent or deficient, photosynthesis cannot occur effectively, so it is also a limiting factor.
- **Option 4: Oxygen** - Oxygen is produced as a byproduct of photosynthesis and does not affect the rate of photosynthesis itself. It is not a raw material or a necessary component for the process to occur.

3. **Conclusion**: Among the options provided, oxygen does not limit photosynthesis, as it is released during the process rather than consumed.

Thus, the correct answer is **Option 4: Oxygen**.