A) NADP
B) RuBP
C) Ferredoxin
D) Cytochrome
Correct Answer: B
Solution :
Dark phase of photosynthesis or Calvin cycle takes place in stroma of chloroplast. First step of dark phase is carboxylation. In carboxylation \[C{{O}_{2}}\]is combined with RuBP to form first stable compound. \[6RuBP+6C{{O}_{2}}\xrightarrow{RuBPcarboxylase}\] 12 phosphoglyceric add NADP acts as hydrogen acceptor. Cytochrome or iron porphyrin protein involves in electron transport chain. Ferredoxin is a pigment. It is a component of photosystem-I and involves in light reaction of photosynthesis.
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