Number of cell organells involved in photorespiration is

Options

A. One
B. Two
C. Three
D. Four.

Answer

To determine the number of cell organelles involved in photorespiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Photorespiration**:
- Photorespiration is a metabolic pathway that occurs in plants, which is essentially the opposite of the Calvin cycle. It involves the consumption of oxygen and the release of carbon dioxide.

2. **Identify the Key Enzyme**:
- The enzyme involved in photorespiration is ribulose-1,5-bisphosphate carboxylase/oxygenase (commonly known as Rubisco). This enzyme catalyzes the reaction that leads to the oxygenation of ribulose-1,5-bisphosphate (RuBP).

3. **Recognize the Process**:
- During photorespiration, plants take in oxygen and release carbon dioxide, which is considered a wasteful process because it does not produce energy but rather consumes it.

4. **Identify the Organelles Involved**:
- Photorespiration occurs in three specific organelles:
- **Chloroplasts**: Where the initial reactions take place.
- **Mitochondria**: Involved in the respiration part of the process.
- **Peroxisomes**: Where the breakdown of certain compounds occurs.

5. **Count the Organelles**:
- The total number of organelles involved in photorespiration is three: chloroplasts, mitochondria, and peroxisomes.

6. **Select the Correct Option**:
- Based on the information gathered, the correct answer to the question is 3.

### Final Answer:
The number of cell organelles involved in photorespiration is **3**.

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