Photorespiration is also known as

Options

A. `C_(2)` cycle
B. `C_(3)` cycle
C. `C_(4)` cycle
D. `C_(1)` cycle

Answer

**Step-by-Step Solution:**

1. **Understanding Photorespiration**: Photorespiration is a process that occurs in plants, particularly in C3 plants, where the enzyme RuBisCO reacts with oxygen instead of carbon dioxide due to the low concentration of CO2 and high concentration of O2.

2. **Identifying the Products**: During photorespiration, RuBisCO catalyzes the reaction between ribulose bisphosphate (RuBP) and oxygen, leading to the formation of one molecule of 3-phosphoglycerate (3-PGA) and one molecule of 2-phosphoglycolate (2-PG).

3. **Recognizing the Cycle**: The 2-phosphoglycolate is a two-carbon compound, and the cycle that involves this compound is referred to as the C2 cycle.

4. **Alternative Names**: Photorespiration is also known as the "oxidative photosynthetic carbon cycle" because it involves the oxidation of 2-phosphoglycolate and is part of the photosynthetic process.

5. **Final Answer**: Therefore, photorespiration is also known as the C2 cycle or the oxidative photosynthetic carbon cycle.

**Final Answer**: Photorespiration is also known as the C2 cycle.

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