Question:
Photorespiration involves which sequence of organelles?
Photorespiration involves which sequence of organelles?
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Remember the mnemonic "CPm" (like CPM) $\rightarrow$ Chloroplast, Peroxisome, Mitochondria.
Updated On: May 5, 2026
- Chloroplast $\rightarrow$ Mitochondria $\rightarrow$ Peroxisome
- Chloroplast $\rightarrow$ Peroxisome $\rightarrow$ Mitochondria
- Peroxisome $\rightarrow$ Chloroplast $\rightarrow$ Mitochondria
- Mitochondria $\rightarrow$ Peroxisome $\rightarrow$ Chloroplast
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Photorespiration (the $C_{2}$ cycle) is a wasteful pathway that occurs when RuBisCO fixes oxygen instead of carbon dioxide.
Step 2: Meaning
This process is complex and requires the coordination of three different cellular compartments to recycle the phosphoglycolate produced.
Step 3: Analysis
The process starts in the Chloroplast (formation of glycolate), continues in the Peroxisome (glycolate to glycine), and finally moves to the Mitochondria (release of $CO_{2}$ and formation of serine).
Step 4: Conclusion
The correct spatial sequence for these reactions is Chloroplast, followed by Peroxisome, then Mitochondria. Final Answer: (B)
Photorespiration (the $C_{2}$ cycle) is a wasteful pathway that occurs when RuBisCO fixes oxygen instead of carbon dioxide.
Step 2: Meaning
This process is complex and requires the coordination of three different cellular compartments to recycle the phosphoglycolate produced.
Step 3: Analysis
The process starts in the Chloroplast (formation of glycolate), continues in the Peroxisome (glycolate to glycine), and finally moves to the Mitochondria (release of $CO_{2}$ and formation of serine).
Step 4: Conclusion
The correct spatial sequence for these reactions is Chloroplast, followed by Peroxisome, then Mitochondria. Final Answer: (B)
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