Interconversion of carbohydrates proteins and lipids in living cells are an example of____________?
Correct answer: C. Both A and B
- A. Coordinated catabolic activities
- B. Coordinated anabolic activities
- C. Both A and B
- D. Any one
Explanation
Cells interconvert carbohydrates, proteins and lipids through linked metabolic pathways, so both breakdown reactions and synthesis reactions are involved. Catabolic pathways release smaller molecules and energy, while anabolic pathways use smaller molecules to build cellular substances. Students may choose only coordinated catabolism or only coordinated anabolism by considering one direction of interconversion and ignoring the other.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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