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Question: Answered & Verified by Expert
Choose the correct combination of labels for the molecules involved in Calvin cycle.

BiologyPhotosynthesis in Higher PlantsNEET
Options:
  • A A-RuBP, B-Triose phosphate, C-PGA
  • B A-PGA, B-RuBP, C-Triose phosphate
  • C A-PGA, B-Triose phosphate, C-RuBP
  • D A-RuBP, B-PGA, C-Triose phosphate
Solution:
1985 Upvotes Verified Answer
The correct answer is: A-RuBP, B-PGA, C-Triose phosphate
A - RuBP

RuBP (Ribulose-1, 5-bisphosphate) accepts atmospheric C O 2 in the presence of the enzyme RuBP carboxylase (RuBisCO) and forms a 6-carbon unstable compound which soon splits into two molecules of a 3-carbon compound called PGA (phosphoglyceric acid)

B - PGA

The phosphoglyceric acid molecules are first phosphorylated by using ATP to produce 1, 3-diphosphoglyceric acid.

C - Some molecules of 3 PGAL are converted into its isomer dihydroxyacetone phosphate (DHAP) in presence of enzyme triose phosphate isomerase.

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