Organelles having enzymes involved in photorespiration are

Options

A. mitochondria, chloroplast & peroxisomes
B. mitochondria, nucleus and ribosomes
C. mitochondria, glyoxysomes and peroxisomes
D. mitochondria , chloroplast & glyoxysomes

Answer

To answer the question regarding the organelles that have enzymes involved in photorespiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Photorespiration**:
- Photorespiration is a process in plants where oxygen is consumed and carbon dioxide is released in the presence of light. It occurs when the enzyme RuBisCO reacts with oxygen instead of carbon dioxide, leading to the formation of a two-carbon compound.

2. **Identifying the Key Organelles**:
- The main organelles involved in photorespiration are:
- **Chloroplasts**: This is where the initial fixation of oxygen occurs, leading to the production of glycolate.
- **Peroxisomes**: These organelles are involved in the conversion of glycolate into other compounds, facilitating the photorespiration process.
- **Mitochondria**: They play a role in releasing carbon dioxide during the breakdown of the compounds formed in the chloroplasts and peroxisomes.

3. **Evaluating the Options**:
- Now, let's evaluate the provided options:
- **Option 1**: Mitochondria, chloroplasts, and peroxisomes - This option includes all three organelles involved in photorespiration.
- **Option 2**: Mitochondria, nucleus, and ribosomes - The nucleus and ribosomes are not directly involved in photorespiration.
- **Option 3**: Mitochondria, glyoxisomes, and peroxisomes - Glyoxisomes are not involved in photorespiration.
- **Option 4**: Mitochondria, chloroplasts, and glyoxisomes - Glyoxisomes are not involved in photorespiration.

4. **Conclusion**:
- The correct answer is **Option 1: Mitochondria, chloroplasts, and peroxisomes**, as these organelles contain the necessary enzymes for the photorespiration process.