Into which two pathways do the catabolic routes for carbohydrates, proteins and lipids eventually connect?
APhotosynthesis and chemiosmosis
BGlycolysis and the citric acid cycle
CFermentation and beta oxidation
DHydrolysis and the Calvin cycle
Answer & Solution
Correct answer: B. Glycolysis and the citric acid cycle
1. Living things eat far more than glucose alone.
2. All of the catabolic pathways for carbohydrates, proteins and lipids eventually connect into glycolysis and the citric acid cycle.
3. That shared meeting point is how a mixed meal ends up as adenosine triphosphate.
4. The Calvin cycle builds sugars in plants and accepts no catabolic input of this kind.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.6 Connections of Carbohydrate, Protein, and Lipid Metabolic Pathways_
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