alleryStart learning →How is the molecule ribulose bisphosphate built?
AThree carbons flanked by one phosphate
BSix carbons flanked by two phosphates
CFour carbons flanked by three phosphates
DFive carbons flanked by two phosphates
Answer & Solution
Correct answer: D. Five carbons flanked by two phosphates
1. Ribulose bisphosphate has five atoms of carbon.
2. Those carbons are flanked by two phosphates.
3. The prefix bis in its name records the pair of phosphate groups.
4. Three carbons with one phosphate describes 3-PGA, which is the product rather than the acceptor.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.3 Using Light Energy to Make Organic Molecules_
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