14. Which of the following statements is false regarding amphibolic pathways? Me

Question

14. Which of the following statements is false regarding amphibolic pathways? Metabolic pathways are amphibolic, that is, catabolism and anabolism are intertwined in order to conserve energy in the cell. a. B Glucose is broken down in glycolysis; however, not all of the intermediates in the pathway are utilized as an. energy source. Many leave the pathway to serve as precursors for complex molecules. C. Glyceraldehyde-3-phosphate is used as a precursor for amino acid, lipid, and carbohydrate synthesis. D.All organisms use metabolic pathways to synthesize the 20 amino acids necessary for protein synthesis using precursors from catabolic processes. Glucose is broken down during glycolysis to pyruvate; however, when glucose is in short supply, pyruvate is used as a precursor in the process of gluconeogenesis. E.

Explanation / Answer

D) is wrong. Not all organisms can via their metabolism synthesize all amino acids. Humans can not synthesize nine of them. Valine, Phenylalanine are among them.

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