21.The series of reactions involving the conversion of glucose to pyruvate is known as which of the following?

a.pyrolysis

b.glycolysis

c.beta-oxidation

d.coupled reaction

22.Which of the following is an aspect of glycolysis?

a.It is irreversible.

b.It can occur only in the presence of oxygen.

c.It can occur only in the absence of oxygen.

d.It generates 2 molecules of pyruvate for each molecule of glucose.

23.Which of the following distinguishes aerobic metabolism from anaerobic metabolism?

a.Little or no oxygen is consumed.

b.Lactic acid is a major byproduct.

c.Energy is produced more slowly.

d.It yields energy for only short periods.

24.Which of the following series outlines the overall sequence of events in the complete oxidation of glucose?

a.Cori cycle, TCA cycle, glycolysis

b.glycolysis, TCA cycle, electron transport chain

c.electron transport chain, TCA cycle, Cori cycle

d.TCA cycle, electron transport chain, glycolysis

25.An aerobic reaction is one that requires which of the following components?

a.alcohol

b.oxygen

c.nitrogen

d.ammonia

26.The Cori cycle involves the interconversion of which of the following pairs?

a.lactate and glucose

b.glucose and amino acids

c.pyruvate and citric acids

d.fatty acids and acetyl-coA

27.Your roommate Demetrius is participating in a weightlifting course and complains of a burning pain during workouts. You explain to Demetrius that this is due to his muscles converting excess pyruvate to which of the following compounds?

a.lactate

b.glycerol

c.acetyl-coA

d.amino acids

28.When a person is performing intense physical exercise and begins to feel fatigue and a burning pain in the muscles, the response of the muscles is to synthesize more of which of the following compounds?

a.lactate

b.glucose

c.citric acid

d.fatty acids

29.Which of the following pathways from pyruvate is irreversible?

a.to glucose

b.to glucogenic amino acids

c.lactate

d.acetyl CoA

30.Which of the following groups contains only compounds that can be formed from metabolized glucose?

a.acetyl CoA, muscle glycogen, urea

b.acetyl-CoA, muscle glycogen, amino acids

c.acetyl CoA, amino acids, ammonia

d.acetyl CoA, muscle glycogen, ammonia