The reaction that is responsible for the primary fixation of CO2 is catalysed by

1. RUBP carboxylase
2. PEP carboxylase
3. RuBP carboxylase and PEP carboxylase
4. PGA synthase

Subtopic:  Dark Reaction : Calvin Cycle | C4 Cycle (Hatch & Slack Pathway) |
 63%
Level 2: 60%+
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