Which of the following is/are classified as catabolism?Group of answer choicesGlycolysisProtein synthesisKrebs cycleFatty acid synthesisCholesterol synthesis
Question
Which of the following is/are classified as catabolism?
Group of answer choices:
- Glycolysis
- Protein synthesis
- Krebs cycle
- Fatty acid synthesis
- Cholesterol synthesis
Solution
Catabolism refers to the set of metabolic pathways that break down molecules into smaller units to release energy. In the context of the options provided:
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Glycolysis: This is a catabolic process. It involves the breakdown of glucose into pyruvate, releasing energy in the form of ATP.
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Protein synthesis: This is an anabolic process, not catabolic. It involves the creation of proteins from amino acids, which requires energy.
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Krebs cycle: This is a catabolic process. It involves the oxidation of acetyl CoA into carbon dioxide, with the release of high-energy molecules like ATP, NADH, and FADH2.
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Fatty acid synthesis: This is an anabolic process, not catabolic. It involves the creation of fatty acids from acetyl-CoA and NADPH, which requires energy.
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Cholesterol synthesis: This is also an anabolic process, not catabolic. It involves the creation of cholesterol from simpler molecules, which requires energy.
So, out of the given options, Glycolysis and the Krebs cycle are classified as catabolic processes.
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