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The citric acid cycle differs from glycolysis in that it is:
AA straight linear path
BA closed regenerating loop
CA single one-step reaction
DA purely anaerobic route
Answer & Solution
Correct answer: B. A closed regenerating loop
1. Glycolysis runs from a starting compound to a different ending compound.
2. The citric acid cycle does not.
3. Unlike glycolysis, the citric acid cycle is a closed loop: the last part of the pathway regenerates the compound used in the first step.
4. Because the final product is also the first reactant, the cycle runs continuously in the presence of sufficient reactants.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 7 'Cellular Respiration', sections 7.1-7.7_
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