glucose metabolism practice quiz Questions With Complete Solutions

The process of _____ converts glucose into _____. -glycolysis; pyruvate -glycogen synthesis; pyruvate -electron transport; CO2 -glycogenolysis; glycogen correct answer: glycolysis, pyruvate What pathway is used to make glucose from other metabolites such as oxaloacetate? correct answer: gluconeogenesis In eukaryotes, glycolysis typically occurs in the _____, gluconeogenesis typically occurs in the _____. correct answer: cytosol; cytosol The coenzyme _____ is the oxidizing agent in glycolysis. correct answer: NAD+ Which of the following represents the net products of glycolysis from one molecule of glucose? correct answer: 2 pyruvate, 2 NADH, 2 ATP In glycolysis, the net gain of ATP during the energy investment phase is _____ while the net gain of ATP during the energy payoff phase is _____. correct answer: -2;4 Hexokinase is an example of a(n) _____ enzyme correct answer: transferase Which of the following enzymes requires ATP ? correct answer: phosphofructokinase What enzyme catalyzes the major regulatory step of glycolysis? correct answer: phosphofructokinase Which of the following is a potent activator of phosphofructokinase in mammals? correct answer: fructose-2,6-bisphosphate In bacterial cells, _____ is an activator of phosphofructokinase while _____ is an inhibitor. correct answer: ADP; phosphoenolpyruvate The enzyme responsible for the synthesis of fructose-2,6-bisphosphate is _____. correct answer: phosphofructokinase-2 Which enzyme is responsible for splitting a hexose into two trioses? correct answer: aldolase What is the name for the process that produces ATP from ADP in glycolysis? correct answer: substrate-level phosphorylation Glyceraldehyde-3-phosphate dehydrogenase oxidizes _____. correct answer: an aldehyde to a carboxylic acid Glyceraldehyde is oxidized to _____ which can transfer a phosphate to _____. correct answer: 1,3-bisphosphoglycerate; ADP Which of the following contains a high energy bond that is used for a substrate-level phosphorylation in glycolysis? correct answer: 1,3-bisphosphoglycerate Under anaerobic conditions in skeletal muscle, pyruvate is converted into _____. correct answer: lactate