31) The enzymes used by the electron transport chain are located:

A) in the cytosol.

B) in the outer membrane of the mitochondrion.

C) in the inner membrane of the mitochondrion.

D) between the inner and outer membranes of the mitochondrion.

32) A total of four ATP molecules have to be used by aerobic respiration in eukaryotic cells. Where are these four ATP molecules used?

A) One molecule is used to start glycolysis, and three are used to move NADH made during glycolysis into the mitochondria.

B) Three molecules are used to start glycolysis, and one is used to move NADH made during glycolysis into the mitochondria.

C) Two molecules are used to start glycolysis, and two are used to move NADH made during glycolysis into the mitochondria.

D) All four molecules are used to start glycolysis.

E) All four molecules are used to move NADH made during glycolysis into the mitochondria.

33) Eukaryotic cells require oxygen to:

A) enter the Krebs cycle as an intermediate.

B) perform fermentation.

C) breathe.

D) serve as an electron acceptor in the electron transport chain.

E) start glycolysis.

34) Certain drugs prevent the formation of a hydrogen ion gradient across the inner mitochondrial membrane. What is the most likely consequence?

A) Most ATP production will stop, and the cell will die.

B) ATP production will increase.

C) Glycolysis will stop.

D) Fermentation will stop.

35) Glycolysis occurs in the ________, the Krebs cycle occurs in the ________, and the electron transport chain occurs in the ________ membrane.

A) mitochondria; mitochondria; mitochondrial

B) cytoplasm; mitochondria; mitochondrial

C) mitochondria; cytoplasm; plasma

D) cytoplasm; cytoplasm; plasma

E) cytoplasm; mitochondria; plasma

36) The enzyme that creates ATP during electron transport is called:

A) ADP phosphotransferase.

B) ATP creatase.

C) ATP polymerase.

D) ATP synthase.

37) The electron transport chain is used during which of the following processes?

A) lactate fermentation

B) aerobic cellular respiration

C) glycolysis

D) alcoholic fermentation

38) Which of the following statements concerning the electron transport chain is false?

A) The final electron acceptor is oxygen.

B) Each NADH yields three ATP molecules.

C) Each FADH2 yields two ATP molecules.

D) The electron transport chain will work whether oxygen is present or not.

39) Oxygen is reduced to water in the cell’s:

A) nucleus.

B) mitochondria.

C) cytoplasm.

D) Golgi apparatus.

E) plasma membrane.

40) During electron transport, how many ATP molecules are produced per NADH molecule and FADH2 molecule?

A) three per NADH and three per FADH2

B) two per NADH and two per FADH2

C) three per NADH and two per FADH2

D) two per NADH and three per FADH2