Topic: C3 and C4 pathways, photorespiration· Plant Physiology

The process which makes major difference between C_3 and C_4 plants is

1. Calvin cycle

2. photorespiration

3. respiration

4. glycolysis

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Answer: 2. photorespiration

The big difference is photorespiration. In \(C_3\) plants RuBisCO also acts as an oxygenase, causing a loss of fixed carbon. In \(C_4\) plants, the Kranz anatomy and PEP carboxylase concentrate \(CO_2\) around RuBisCO, so photorespiration is almost absent.

Calvin cycle, respiration and glycolysis occur in both types.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The process which makes major difference between C_3 and C_4 plants is

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