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At the end of the electron transport chain, the electrons are finally accepted by:
ACarbon dioxide
BMolecular oxygen
CRibose sugar
DSodium chloride
Answer & Solution
Correct answer: B. Molecular oxygen
1. Electron transport is a series of redox reactions resembling a relay race.
2. Electrons are passed rapidly from one component to the next.
3. At the endpoint of the chain the electrons reduce molecular oxygen, producing water.
4. That is exactly why the pathway is aerobic.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 7 'Cellular Respiration', sections 7.1-7.7_
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