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When Protein Molecules Are Used as Energy Sources, the Amino

Question 54

Multiple Choice

When protein molecules are used as energy sources, the amino groups of the amino acids are ____ and the carbon backbones enter ____.


A) excreted as free amino groups (-NH2) ; glycolysis
B) build new proteins; the electron transfer chain
C) excreted as ammonia (NH3) ; the citric acid cycle
D) used to synthesize nucleic acids; glycolysis
E) converted to glycogen; citric acid cycle

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