41) What is the final net number of ATP molecules that can be produced per glucose molecule by cellular respiration?

A) 36

B) 4

C) 8

D) 2

E) 38

42) What is the energy source used to drive ATP synthase to produce ATP?

A) glucose coming across the mitochondrial inner membrane

B) H+ ions flowing across the mitochondrial inner membrane

C) acetyl CoA coming across the mitochondrial inner membrane

D) NADH coming across the mitochondrial inner membrane

E) electrons flowing through the electron transport chain

43) What role do hydrogen ions (H+) play in the electron transport chain?

A) They are pumped across the mitochondrial inner membrane against their concentration gradient (to where their concentration is high); as the H+ ions flow back to where their concentration is low, they drive ATP synthase to form ATP.

B) They are pumped across the mitochondrial inner membrane against their concentration gradient (to where their concentration is low); as the H+ ions flow back to where their concentration is high, they drive ATP synthase to form ATP.

C) They add phosphate groups on ADP to form ATP.

D) They transfer electrons to the electron transport chain.

44) During cellular respiration:

A) glucose is reduced and oxygen is oxidized.

B) glucose is oxidized and oxygen is reduced.

C) oxygen oxidizes glucose directly.

D) both glucose and oxygen get reduced.

45) Electrons lose energy as they pass down the electron transport chain. What is this energy used for?

A) to power hydrogen ion pumps

B) to link oxygen to hydrogen ions

C) to power water pumps

D) to directly power ATP synthase

46) Which of the following statements is true of aerobic respiration?

A) Fats proceed through aerobic respiration in exactly the same manner as glucose.

B) Proteins proceed through aerobic respiration in exactly the same manner as glucose.

C) Glucose will be completely broken down even if oxygen is not present.

D) Glucose, fats, and proteins can be oxidized by aerobic respiration

47) In order for a fat to be used for energy, it must first be broken down into:

A) amino acids.

B) glucose.

C) fatty acids and sugars.

D) fatty acids and glycerol.

48) Which of the following types of foods can be oxidized by aerobic respiration?

A) only glucose

B) only fats

C) only proteins

D) only glucose and fats

E) glucose, fats, and proteins

49) Before starch can be used for cellular respiration, it must be broken down into:

A) pyruvate.

B) fatty acid.

C) oxaloacetatic acid.

D) amino acids.

E) glucose.

50) Before proteins can be used for cellular respiration, they must be broken down into:

A) pyruvate.

B) fatty acids.

C) amino acids.

D) glucose.