AP Biologyeasymcq1 pt
Which enzyme fixes CO₂ in the Calvin cycle?
A.RuBisCO
B.ATP synthase
C.RuBP carboxylase only in C4 plants
D.NADP⁺ reductase
Explanation
Core Concept
RuBisCO attaches CO₂ to RuBP, the entry step of carbon fixation. It is the most abundant protein on Earth.
Correct Answer
ARuBisCO
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