Starting with one molecule of isocitrate and ending with fumarate, what is the maximum number of ATP molecules that could be made through substrate-level phosphorylation? A) 1 B) 2 C) 11 D) 12 E) 24 Answer: A Topic: Concept 9.3 Skill: Application/Analysis 36) Carbon skeletons for amino acid biosynthesis are supplied by intermediates of the citric acid cycle. Which intermediate would supply the carbon skeleton for synthesis of a five-carbon amino acid? 37) How many molecules of carbon dioxide (CO2) would be produced by five turns of the citric acid cycle? A) 2 B) 5 C) 10 D) 12 E) 60 Answer: C Topic: Concept 9.3 Skill: Application/Analysis 38) How many reduced dinucleotides would be produced with four turns of the citric acid cycle? A) 1 FADH2 and 4 NADH B) 2 FADH2 and 8 NADH C) 4 FADH2 and 12 NADH D) 1 FAD and 4 NAD+ E) 4 FAD+ and 12 NAD+ Answer: C Topic: Concept 9.3 Skill: Application/Analysis 39) Starting with citrate, which of the following combinations of product