alleryStart learning →Glycolysis begins with one six-carbon glucose molecule. What does it end with?
AOne molecule of a six-carbon sugar
BTwo molecules of a three-carbon sugar
CThree molecules of a two-carbon acid
DSix molecules of a one-carbon gas
Answer & Solution
Correct answer: B. Two molecules of a three-carbon sugar
1. Glycolysis begins with the six carbon ring-shaped structure of a single glucose molecule.
2. It ends with two molecules of a three-carbon sugar called pyruvate.
3. Six carbons split evenly into two lots of three, so the carbon count balances.
4. Carbon dioxide is not released during glycolysis, so the six one-carbon option is wrong.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.2 Glycolysis_
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