2. Pyruvate, the end product of glycolysis, enters the citric acid cycle after it has been converted to___________. (A) acetyl-CoA (B) acetaldehyde (C) glucose (D) acetic acid (E) lactic acid

6. Planarity of the peptide bond means that rotation is allowed about the bond linking ___________the and the carbon of the peptide bond, and also about the bond linking the___________ to the adjacent α-carbon. (A) a-carbon, carbony1 carbon (B) B-carbon, carbonyl carbon (C) carbonyl carbon, nitrogen of the peptide bond (D) a-carbon, nitrogen of the peptide bond (E) none are true

2. Pyruvate, the end product of glycolysis, enters the citric acid cycle after it has been converted to___________.
(A) acetyl-CoA
(B) acetaldehyde
(C) glucose
(D) acetic acid
(E) lactic acid

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