Choose the correct answer from the alternatives given. The end product of the Calvin cycle is
A
ribulose bisphosphate
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B
phosphoglyceraldehyde (PGAL)
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C
PEP carboxylase (PEP case)
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D
carbon dioxide
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Solution
The correct option is C phosphoglyceraldehyde (PGAL) The last phase of the Calvin cycle is labelled regeneration as the remaining PGAL is enzymatically converted from the three-carbon sugar-phosphate into more ribulose-1,5-bisphosphate (RuBP) so that the Calvin cycle can continue to go around again.