Question 1

Electron flow down the electron-transport chain leads to:

Accepted Answer

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.

Question 2

Choose the correct path taken by a pair of electrons as they travel down the electron-transport chain.

Accepted Answer

A)  NADH → Complex I → CoQ → Complex III → Cytochrome c → Complex IV → O2 
B)  FADH2 → Complex I → CoQ → Complex III → Cytochrome c → Complex IV → O2 
C)  NADH → Complex I → Complex II→ Complex III → Cytochrome c → Complex IV → O2 
D)  FADH2 → Complex II → CoQ → Complex III → Cytochrome c → Complex IV → O2 
E)  A and D

Question 3

The Q cycle:

Accepted Answer

A)  transfers electrons from a two-electron carrier to a one-electron carrier. 
B)  recycles protons. 
C)  acts as an NADH exchange with the cytosol. 
D)  A and B. 
E)  A, B and C.

Question 4

Complex IV is also known as ________________.

Accepted Answer

The answer of Complex IV is also known as ________________....

Question 5

________________ donates electrons to cytochrome C.

Accepted Answer

The answer of ________________ donates electrons to cytochrome C....

Question 6

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The prosthetic group _______________ is present in complexes I, II, and III of electron transport.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 7

To what extent is ATP recycled on a daily basis?

Accepted Answer

A)  50 ATPs per day 
B)  300 ATPs per day 
C)  1500 ATPs per day 
D)  3000 ATPs per day 
E)  None of the above.

Question 8

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-A strong oxidizing agent has a strong tendency to ________________ (accept, donate) electron(s).

Accepted Answer

The answer of Use the following to answer questions
Choose the...

Question 9

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-_______________ is an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 10

Calculate the ∆G°ʹ for the reaction where lactate + NAD+ is converted to pyruvate + NADH.

Accepted Answer

The answer of Calculate the ∆G°ʹ for the reaction where...

Question 11

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-_______________ is the complex with three Fe-sulfhydryl electron acceptors.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 12

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Another name for ubiquinone is ________________.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 13

In which direction do electrons flow in the electron transport chain?

Accepted Answer

The answer of In which direction do electrons flow in...

Question 14

What is a major defense strategy against oxidative damage caused by reactive oxygen species (ROS)?

Accepted Answer

The answer of What is a major defense strategy against...

Question 15

Explain why less ATP is made from the reoxidation of FADH2 compared to NADH.

Accepted Answer

The answer of Explain why less ATP is made from...

Question 16

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Cytochrome ________________ is the only water-soluble cytochrome of the electron-transport chain.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Question 17

What is the "dead zone" in the Gulf of Mexico and how did it come into being?

Accepted Answer

The answer of What is the "dead zone" in the...

Question 18

What are the fully oxidized and fully reduced states of coenzyme Q and how are they related to transmembrane proton transport?

Accepted Answer

The answer of What are the fully oxidized and fully...

Question 19

In proteins, these amino acid residues usually complex to the iron-sulfur clusters.

Accepted Answer

A)  glycine 
B)  arginine 
C)  cysteine 
D)  All of the above. 
E)  None of the above.

Question 20

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-The citric acid cycle enzyme _______________ is also part of an electron-transport complex.

Accepted Answer

A) mitochondria 
B) ubiquinone 
C) coenzyme Q 
D) flavin mononucleotide (FMN) 
E) iron-sulfur clusters
F)respiration
G)transporters
H)porins
I)succinate dehydrogenase
J)cytochrome c oxidase
K)Complex II
L)Complex III

Exam 20: The Electron Transport Chain

Electron flow down the electron-transport chain leads to:

Choose the correct path taken by a pair of electrons as they travel down the electron-transport chain.

The Q cycle:

Complex IV is also known as ________________.

________________ donates electrons to cytochrome C.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The prosthetic group _______________ is present in complexes I, II, and III of electron transport.

To what extent is ATP recycled on a daily basis?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -A strong oxidizing agent has a strong tendency to ________________ (accept, donate) electron(s).

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -_______________ is an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor.

Calculate the ∆G°ʹ for the reaction where lactate + NAD+ is converted to pyruvate + NADH.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -_______________ is the complex with three Fe-sulfhydryl electron acceptors.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Another name for ubiquinone is ________________.

In which direction do electrons flow in the electron transport chain?

What is a major defense strategy against oxidative damage caused by reactive oxygen species (ROS)?

Explain why less ATP is made from the reoxidation of FADH2 compared to NADH.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Cytochrome ________________ is the only water-soluble cytochrome of the electron-transport chain.

What is the "dead zone" in the Gulf of Mexico and how did it come into being?

What are the fully oxidized and fully reduced states of coenzyme Q and how are they related to transmembrane proton transport?

In proteins, these amino acid residues usually complex to the iron-sulfur clusters.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -The citric acid cycle enzyme _______________ is also part of an electron-transport complex.