Read the given statements and selct the correct option.
Statement 1: Photorespiration interferes with the successful functioning of Calvin cycle.
Statement 2: Photorespiration oxidises ribulose-1,5 biphosphate which is an acceptor of `CO_(2)` in Calvin cycle.

Options

A. Both statement 1 and 2 are correct.
B. Statement 1 is correct but statement 2 is incorrect.
C. Statement 1 is incorrect but statement 2 is correct
D. Both statements 1 and 2 are incorrect.

Explanation

To analyze the given statements regarding photorespiration and its effect on the Calvin cycle, let's break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Photorespiration**:
- Photorespiration is a process that occurs in plants where the enzyme RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) catalyzes the reaction of ribulose-1,5-bisphosphate (RuBP) with oxygen instead of carbon dioxide.
- This process typically occurs under conditions where the concentration of oxygen is high and the concentration of carbon dioxide is low, such as in hot and dry environments when stomata close.

2. **Impact on the Calvin Cycle**:
- The Calvin cycle is responsible for fixing carbon dioxide into organic molecules, ultimately producing glucose.
- When RuBisCO reacts with oxygen instead of carbon dioxide, it leads to the production of a two-carbon compound (phosphoglycolate) and a three-carbon compound (3-phosphoglycerate or 3-PGA).
- The production of phosphoglycolate is problematic because it cannot enter the Calvin cycle, effectively reducing the efficiency of carbon fixation.

3. **Evaluating Statement 1**:
- **Statement 1**: "Photorespiration interferes with the successful functioning of the Calvin cycle."
- This statement is **true** because photorespiration reduces the amount of carbon dioxide available for the Calvin cycle, thus hindering its efficiency and success.

4. **Evaluating Statement 2**:
- **Statement 2**: "Photorespiration oxidizes ribulose-1,5-bisphosphate which is an acceptor of CO2 in the Calvin cycle."
- This statement is also **true**. During photorespiration, RuBP is indeed oxidized by RuBisCO, leading to the formation of products that do not contribute to the Calvin cycle.

5. **Conclusion**:
- Both statements are true. Therefore, the correct option is that both Statement 1 and Statement 2 are correct.

### Final Answer:
Both Statement 1 and Statement 2 are true.

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