Question 1

A species in the electron transport chain that can participate in a two-electron transfer is

Accepted Answer

A)  iron-sulfur proteins. 
B)  cytochrome b . 
C)  cytochrome c . 
D)  coenzyme Q. 
A)  iron-sulfur proteins. 
B)  cytochrome b . 
C)  cytochrome c . 
D)  coenzyme Q.

Question 2

How many electrons are required for the complete reduction of one molecule of oxygen gas?

Accepted Answer

A)  one 
B)  two 
C)  four 
D)  eight 
A)  one 
B)  two 
C)  four 
D)  eight

Question 3

Which of the following is not true of the process of oxidative phosphorylation?

Accepted Answer

A)  protons flow into the mitochondrial matrix through ion channels in the ATP synthase 
B)  the F0 part of the ATP synthase serves as a proton channel 
C)  the F1 part of the ATP synthase is the site of ATP formation 
D)  iron-sulfur proteins bind to the ATP synthase 
A)  protons flow into the mitochondrial matrix through ion channels in the ATP synthase 
B)  the F0 part of the ATP synthase serves as a proton channel 
C)  the F1 part of the ATP synthase is the site of ATP formation 
D)  iron-sulfur proteins bind to the ATP synthase

Question 4

The ultimate electron acceptor in the electron transport chain is

Accepted Answer

A)  NAD+. 
B)  FAD. 
C)  oxygen. 
D)  ADP. 
E)  none of these 
A)  NAD+. 
B)  FAD. 
C)  oxygen. 
D)  ADP. 
E)  none of these

Question 5

Which of the following is not a part of the electron transport chain?

Accepted Answer

A)  NADH 
B)  FADH2 
C)  coenzyme Q 
D)  coenzyme A 
A)  NADH 
B)  FADH2 
C)  coenzyme Q 
D)  coenzyme A

Question 6

Electron flow in the mitochondria follows this pathway:

Accepted Answer

A)  Complex I → complex II → complex III → complex IV. 
B)  Complex IV → complex III → complex II → complex I. 
C)  Complex I → complex III → complex IV. 
D)  Complex II → complex III → complex IV. 
E)  Both complex I → III → IV and complex II → III → IV. 
A)  Complex I → complex II → complex III → complex IV. 
B)  Complex IV → complex III → complex II → complex I. 
C)  Complex I → complex III → complex IV. 
D)  Complex II → complex III → complex IV. 
E)  Both complex I → III → IV and complex II → III → IV.

Question 7

The reference reaction for determining reduction potentials (E ° = 0) is the reduction of

Accepted Answer

A)  oxygen (O2) to water. 
B)  NAD+ to NADH. 
C)  H+ to H2 gas. 
D)  FAD to FADH2. 
E)  none of these 
A)  oxygen (O2) to water. 
B)  NAD+ to NADH. 
C)  H+ to H2 gas. 
D)  FAD to FADH2. 
E)  none of these

Question 8

Complex I of the electron transport chain oxidizes ____, reduces ____, and ____ protons in the process.

Accepted Answer

A)  FADH2; coenzyme Q; doesn't pump 
B)  FADH2; coenzyme Q; pumps 
C)  NADH; coenzyme Q; doesn't pump 
D)  NADH; coenzyme Q; pumps 
A)  FADH2; coenzyme Q; doesn't pump 
B)  FADH2; coenzyme Q; pumps 
C)  NADH; coenzyme Q; doesn't pump 
D)  NADH; coenzyme Q; pumps

Question 9

Which complex contains succinate dehydrogenase?

Accepted Answer

A)  Complex I 
B)  Complex II 
C)  Complex III 
D)  Complex IV 
E)  It is not known where succinate dehydrogenase is located. 
A)  Complex I 
B)  Complex II 
C)  Complex III 
D)  Complex IV 
E)  It is not known where succinate dehydrogenase is located.

Question 10

Uncouplers are compounds that inhibit the phosphorylation of ADP

Accepted Answer

A)  by enhancing the proton gradient across the outer mitochondrial membrane. 
B)  by enhancing the proton gradient across the inner mitochondrial membrane. 
C)  because they are transmembrane proteins in the outer mitochondrial membrane. 
D)  without affecting electron transport. 
A)  by enhancing the proton gradient across the outer mitochondrial membrane. 
B)  by enhancing the proton gradient across the inner mitochondrial membrane. 
C)  because they are transmembrane proteins in the outer mitochondrial membrane. 
D)  without affecting electron transport.

Question 11

​ Explain how uncouplers, dinitrophenol and valinomycin differ from one another.

Accepted Answer

The conjugate base of dinitrophenol acid

A species in the electron transport chain that can participate in a two-electron transfer is

How many electrons are required for the complete reduction of one molecule of oxygen gas?

Which of the following is not true of the process of oxidative phosphorylation?

The ultimate electron acceptor in the electron transport chain is

Which of the following is not a part of the electron transport chain?

Electron flow in the mitochondria follows this pathway:

The reference reaction for determining reduction potentials (E ° = 0) is the reduction of

Complex I of the electron transport chain oxidizes , reduces , and protons in the process.

Which complex contains succinate dehydrogenase?

Uncouplers are compounds that inhibit the phosphorylation of ADP

Explain how uncouplers, dinitrophenol and valinomycin differ from one another.

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Exam 20: Electron Transport and Oxidative Phosphorylation

A species in the electron transport chain that can participate in a two-electron transfer is

How many electrons are required for the complete reduction of one molecule of oxygen gas?

Which of the following is not true of the process of oxidative phosphorylation?

The ultimate electron acceptor in the electron transport chain is

Which of the following is not a part of the electron transport chain?

Electron flow in the mitochondria follows this pathway:

The reference reaction for determining reduction potentials (E ° = 0) is the reduction of

Complex I of the electron transport chain oxidizes ____, reduces ____, and ____ protons in the process.

Which complex contains succinate dehydrogenase?

Uncouplers are compounds that inhibit the phosphorylation of ADP

​ Explain how uncouplers, dinitrophenol and valinomycin differ from one another.

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Nucleic Acids How Structure Conveys Information

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Complex I of the electron transport chain oxidizes , reduces , and protons in the process.

Explain how uncouplers, dinitrophenol and valinomycin differ from one another.