Same chapter3 marksDifficulty: Medium
Describe cyclic and non-cyclic photophosphorylation.
Photosynthesis and Respiration in Plants
3 marksDifficulty: Medium
What is photorespiration and why is it regarded as wasteful?
Original Khojo Papers practice question — not from a past board paper.
Answer
Photorespiration occurs when RuBisCO fixes oxygen instead of carbon dioxide, which happens when the carbon dioxide concentration is low and the temperature high. The pathway consumes ATP and releases carbon dioxide without producing any sugar or ATP, so it undoes part of the work of photosynthesis.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
C4 plants avoid it by concentrating carbon dioxide in the bundle sheath cells.
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