What organelle recycles carbon from phosphoglycolate during photorespiration in plant cells?

• A. Mitochondrion
• B. Peroxisome
• C. Chloroplast
• D. Golgi apparatus

Answer: (B)

Verified step by step guidance

1. Understand the process of photorespiration: Photorespiration is a process in plant cells where the enzyme RuBisCO oxygenates RuBP, leading to the production of phosphoglycolate, a compound that needs to be recycled.
2. Identify the organelles involved in photorespiration: The process involves multiple organelles, including chloroplasts, peroxisomes, and mitochondria.
3. Focus on the role of peroxisomes: Peroxisomes are responsible for converting phosphoglycolate into a form that can be further processed. They play a crucial role in recycling carbon during photorespiration.
4. Differentiate the functions of other organelles: Chloroplasts are involved in the initial steps of photorespiration, while mitochondria are involved in later steps. The Golgi apparatus is not directly involved in photorespiration.
5. Conclude that peroxisomes are the organelles that recycle carbon from phosphoglycolate during photorespiration, as they convert phosphoglycolate into glycine, which is then transported to mitochondria for further processing.