On photorespiration the number of ATP and NADPH synthesised are respectively

Options

A. 1 and 3
B. 2 and 3
C. 3 and 4
D. O and O

Answer

To solve the question regarding the number of ATP and NADPH synthesized during photorespiration, we can follow these steps:

### Step 1: Understand the Process of Photorespiration
Photorespiration is a metabolic process that occurs in plants, primarily when there is a high concentration of oxygen and a low concentration of carbon dioxide. This process is considered wasteful because it leads to the loss of fixed carbon and the release of carbon dioxide.

**Hint:** Remember that photorespiration occurs when the enzyme Rubisco acts on oxygen instead of carbon dioxide.

### Step 2: Identify the Organelles Involved
Photorespiration takes place in three organelles: chloroplasts, peroxisomes, and mitochondria. Each of these organelles plays a role in the conversion and processing of substrates during this process.

**Hint:** Think about how each organelle contributes to the overall process of photorespiration.

### Step 3: Analyze Energy Consumption
During photorespiration, energy is consumed rather than produced. The process requires ATP and NADPH for the reactions to occur, which means that these molecules are utilized rather than synthesized.

**Hint:** Focus on the fact that photorespiration is a process that consumes energy.

### Step 4: Determine the Number of ATP and NADPH Synthesized
Since photorespiration is a process that consumes ATP and NADPH, the number of ATP and NADPH synthesized during this process is effectively zero.

**Hint:** Consider the options provided and remember that synthesis means production, while consumption means usage.

### Conclusion
Based on the analysis, the correct answer to the question is that during photorespiration, the number of ATP and NADPH synthesized are respectively **0 and 0**.

### Final Answer
**0 and 0**