Question 1

The unequal distribution of H+ across the inner mitochondrial membrane creates a ________________ force.

Accepted Answer

Question 2

The energy for ATP synthesis is generated by the movement of protons from the ______________ side of the inner mitochondrial membrane establishing a(an)_____________ gradient.

Accepted Answer

A)  intermembrane; pH 
B)  intermembrane; electrical potential 
C)  matrix; sodium ion 
D)  matrix; pH 
E)  None of the answers is correct. 
A)  intermembrane; pH 
B)  intermembrane; electrical potential 
C)  matrix; sodium ion 
D)  matrix; pH 
E)  None of the answers is correct.

Question 3

What are uncoupling agents? Provide an example of when these might be useful.

Accepted Answer

Uncoupling agents destroy the proton gra

Question 4

_______________ is a molecular assembly in the inner mitochondrial membrane that carries out the synthesis of ATP.

Accepted Answer

F₁F₀ ATPase,

Question 5

In prokaryotes the site of ATP-synthesizing machinery is

Accepted Answer

A)  the mitochondrial matrix. 
B)  the outer cell wall. 
C)  the cytoplasmic membrane. 
D)  the nucleolus. 
E)  None of the answers is correct. 
A)  the mitochondrial matrix. 
B)  the outer cell wall. 
C)  the cytoplasmic membrane. 
D)  the nucleolus. 
E)  None of the answers is correct.

Question 6

What term is used to describe an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor?

Accepted Answer

A)  electron transport 
B)  respiration 
C)  fermentation 
D)  anaerobic phosphorylation 
E)  None of the answers is correct. 
A)  electron transport 
B)  respiration 
C)  fermentation 
D)  anaerobic phosphorylation 
E)  None of the answers is correct.

Question 7

Which of the following does not pump protons?

Accepted Answer

A)  Complex I 
B)  Complex II 
C)  Complex III 
D)  Complex IV 
E)  All of the answers are correct. 
A)  Complex I 
B)  Complex II 
C)  Complex III 
D)  Complex IV 
E)  All of the answers are correct.

Question 8

What name is given to the hypothesis proposed by Peter Mitchell that explains how ATP synthesis is coupled to electron transport?

Accepted Answer

A)  chemiosmotic hypothesis 
B)  oxidative phosphorylation hypothesis 
C)  electron transport hypothesis 
D)  proton-motive force hypothesis 
E)  None of the answers is correct. 
A)  chemiosmotic hypothesis 
B)  oxidative phosphorylation hypothesis 
C)  electron transport hypothesis 
D)  proton-motive force hypothesis 
E)  None of the answers is correct.

Question 9

What organelle is the site of oxidative phosphorylation in eukaryotes?

Accepted Answer

A)  mitochondria 
B)  chloroplast 
C)  lysosome 
D)  endoplasmic reticulum 
E)  Golgi apparatus 
A)  mitochondria 
B)  chloroplast 
C)  lysosome 
D)  endoplasmic reticulum 
E)  Golgi apparatus

Question 10

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

Accepted Answer

A)  NADH$\rarr$ Complex I $\rarr$ CoQ $\rarr$ Complex III $\rarr$ Cyt c $\rarr$ Complex IV $\rarr$ O2 
B)  FADH2 $\rarr$Complex I $\rarr$ CoQ $\rarr$ Complex III $\rarr$ Cyt c $\rarr$ Complex IV $\rarr$O2 
C)  NADH $\rarr$ Complex I $\rarr$ Complex II$\rarr$ Complex III $\rarr$ Cyt c $\rarr$ Complex IV $\rarr$ O2 
D)  FADH2 $\rarr$ Complex III $\rarr$ CoQ $\rarr$Complex II $\rarr$Cyt c $\rarr$ Complex IV $\rarr$O2 
E)  None of the answers is correct. 
A)  NADH$\rarr$ Complex I $\rarr$ CoQ $\rarr$ Complex III $\rarr$ Cyt c $\rarr$ Complex IV $\rarr$ O2 
B)  FADH2 $\rarr$Complex I $\rarr$ CoQ $\rarr$ Complex III $\rarr$ Cyt c $\rarr$ Complex IV $\rarr$O2 
C)  NADH $\rarr$ Complex I $\rarr$ Complex II$\rarr$ Complex III $\rarr$ Cyt c $\rarr$ Complex IV $\rarr$ O2 
D)  FADH2 $\rarr$ Complex III $\rarr$ CoQ $\rarr$Complex II $\rarr$Cyt c $\rarr$ Complex IV $\rarr$O2 
E)  None of the answers is correct.

Exam 18: Oxidative Phosphorylation

The unequal distribution of H+ across the inner mitochondrial membrane creates a ________________ force.

The energy for ATP synthesis is generated by the movement of protons from the ______________ side of the inner mitochondrial membrane establishing a(an)_____________ gradient.

What are uncoupling agents? Provide an example of when these might be useful.

_______________ is a molecular assembly in the inner mitochondrial membrane that carries out the synthesis of ATP.

In prokaryotes the site of ATP-synthesizing machinery is

What term is used to describe an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor?

Which of the following does not pump protons?

What name is given to the hypothesis proposed by Peter Mitchell that explains how ATP synthesis is coupled to electron transport?

What organelle is the site of oxidative phosphorylation in eukaryotes?

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

Biochemistry: An Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, repair, and Recombination

RNA Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

The unequal distribution of H⁺ across the inner mitochondrial membrane creates a ________________ force.

The energy for ATP synthesis is generated by the movement of protons from the __ side of the inner mitochondrial membrane establishing a(an)_ gradient.