Question

Which cell organelle is the primary site for the photorespiration (C2 cycle) glycolate pathway?

• A. Chloroplast
• B. Mitochondrion
• C. Peroxisome
• D. Nucleus

Hint:

Photorespiration involves coordination between chloroplast, peroxisome, and mitochondrion, but the glycolate pathway is centered in the peroxisome.

Answer 1

The Correct Option is C

Concept: Photorespiration (C$_2$ cycle) is a process involving multiple organelles, where glycolate metabolism plays a key role.
Step 1: Understanding photorespiration.}
Photorespiration occurs when RuBisCO oxygenates RuBP, leading to the formation of glycolate.
Step 2: Identifying the primary site.}
Glycolate is processed mainly in the peroxisome, where it is converted into glycine and other intermediates.
Step 3: Role of other organelles.}

• Chloroplast – Initial reaction occurs here.
• Mitochondrion – Further metabolism of glycine.
• Peroxisome – Main site of glycolate pathway.