Oxidative Phosphorylation Test Ban UPDATED ACTUAL
QUESTIONS AND CORRECT Answers
A strong oxidizing agent has a strong tendency to accept
(accept, donate) electron(s).
In the initial step of Complex I, two high-potential flavin mononucleotide (FMN)
electrons are transferred from NADH to the
prosthetic group of this complex.
Cytochrome is the only water-soluble c
cytochrome of the electron-transport chain.
carries electrons from Complex III to Cytochrome c
Complex IV.
is a poison because it blocks the flow of Cyanide
electrons from cytochrome c to oxygen.
What type of gradient is critical to ATP formation by C) proton
oxidative phosphorylation?
A) sodium ion
B) chloride ion
C) proton
D) potassium ion
E) None of the above.
, Choose the correct path taken by a pair of electrons as E) A and D.
they travel down the electron-transport chain.
A) NADH → Complex I → CoQ → Complex III → Cyt c
→ Complex IV → O2
B) FADH2 → Complex I → CoQ → Complex III → Cyt c
→ Complex IV → O2
C) NADH → Complex I → Complex II→ Complex III →
Cyt c → Complex IV → O2
D) FADH2 → Complex II → CoQ → Complex III → Cyt
c → Complex IV → O2
E) A and D.
Which of the following does NOT participate in, nor is a A) lipoic acid
component of, the electron-transport chain?
A) lipoic acid
B) nonheme, iron-sulfur proteins
C) FADH2
D) cytochrome c1
E) NADH
In prokaryotes the site of ATP-synthesizing machinery is C) the cytoplasmic membrane.
A) the mitochondrial matrix.
B) the outer cell wall.
C) the cytoplasmic membrane.
D) the nucleolus.
E) none of the above.
Electron flow down the electron-transport chain leads A) the transport of protons across the inner mitochondrial membrane from
to the: inside the matrix to the intermembrane space
A) the transport of protons across the inner
mitochondrial membrane from inside the matrix to the
intermembrane space
B) the transport of protons across the inner
mitochondrial membrane from the intermembrane
space into the matrix
C) the coupled synthesis of GTP
D) a dangerous imbalance of K+ ions across the
mitochondrial membrane
E) none of the above
Coenzyme Q is also called: C) ubiquinone.
A) NADH.
B) oxidoreductase.
C) ubiquinone.
D) All of the above.
E) None of the above.
Which of the following does not pump protons? B) Complex II
A) Complex I
B) Complex II
C) Complex III
D) Complex IV
E) All of the above.
QUESTIONS AND CORRECT Answers
A strong oxidizing agent has a strong tendency to accept
(accept, donate) electron(s).
In the initial step of Complex I, two high-potential flavin mononucleotide (FMN)
electrons are transferred from NADH to the
prosthetic group of this complex.
Cytochrome is the only water-soluble c
cytochrome of the electron-transport chain.
carries electrons from Complex III to Cytochrome c
Complex IV.
is a poison because it blocks the flow of Cyanide
electrons from cytochrome c to oxygen.
What type of gradient is critical to ATP formation by C) proton
oxidative phosphorylation?
A) sodium ion
B) chloride ion
C) proton
D) potassium ion
E) None of the above.
, Choose the correct path taken by a pair of electrons as E) A and D.
they travel down the electron-transport chain.
A) NADH → Complex I → CoQ → Complex III → Cyt c
→ Complex IV → O2
B) FADH2 → Complex I → CoQ → Complex III → Cyt c
→ Complex IV → O2
C) NADH → Complex I → Complex II→ Complex III →
Cyt c → Complex IV → O2
D) FADH2 → Complex II → CoQ → Complex III → Cyt
c → Complex IV → O2
E) A and D.
Which of the following does NOT participate in, nor is a A) lipoic acid
component of, the electron-transport chain?
A) lipoic acid
B) nonheme, iron-sulfur proteins
C) FADH2
D) cytochrome c1
E) NADH
In prokaryotes the site of ATP-synthesizing machinery is C) the cytoplasmic membrane.
A) the mitochondrial matrix.
B) the outer cell wall.
C) the cytoplasmic membrane.
D) the nucleolus.
E) none of the above.
Electron flow down the electron-transport chain leads A) the transport of protons across the inner mitochondrial membrane from
to the: inside the matrix to the intermembrane space
A) the transport of protons across the inner
mitochondrial membrane from inside the matrix to the
intermembrane space
B) the transport of protons across the inner
mitochondrial membrane from the intermembrane
space into the matrix
C) the coupled synthesis of GTP
D) a dangerous imbalance of K+ ions across the
mitochondrial membrane
E) none of the above
Coenzyme Q is also called: C) ubiquinone.
A) NADH.
B) oxidoreductase.
C) ubiquinone.
D) All of the above.
E) None of the above.
Which of the following does not pump protons? B) Complex II
A) Complex I
B) Complex II
C) Complex III
D) Complex IV
E) All of the above.
