In the Calvin cycle of $C_3$ plants,which molecule acts as the primary $CO_2$ acceptor?

  • A
    Phosphoenolpyruvate $(PEP)$
  • B
    Ribulose $1,5$-bisphosphate $(RuBP)$
  • C
    Phosphoglyceric acid $(PGA)$
  • D
    Ribulose monophosphate $(RMP)$

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$RuBP + CO_2 + H_2O \xrightarrow{RuBisCO} \dots$

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