Complete the given below sequence of C4 pathway. CO₂ fixation → [C₄ acid] → Transport → Decarboxylation → [C₃ acid + CO₂]
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Complete pathway:
- CO₂ fixation (mesophyll): PEP + CO₂ → Oxaloacetate (C₄ acid)
- Reduction (mesophyll): Oxaloacetate → Malate/Aspartate (C₄ acids)
- Transport (via plasmodesmata): C₄ acids move to bundle sheath cells
- Decarboxylation (bundle sheath): C₄ acid → Pyruvate (C₃ acid) + CO₂
- Calvin cycle (bundle sheath): Released CO₂ fixed by RuBisCO
- Regeneration (mesophyll): Pyruvate → PEP
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