Which simple carbohydrate is produced by photosynthesis and can later be converted into glucose or sucrose?
ARibulose bisphosphate
BGlyceraldehyde-3-phosphate
CPhosphoenolpyruvate
DGlucose-6-phosphate
Answer & Solution
Correct answer: B. Glyceraldehyde-3-phosphate
1. Once photosynthesis is complete it releases oxygen and produces glyceraldehyde-3-phosphate.
2. These are simple carbohydrate molecules that are high in energy.
3. They can subsequently be converted into glucose, sucrose or dozens of other sugar molecules.
4. Ribulose bisphosphate is the five-carbon acceptor that starts the cycle, not the exported product.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.1 Overview of Photosynthesis_
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