Question 1

In what ways can pyruvate and NADH be metabolized?

Accepted Answer

A) fermentation,hydrolysis of PGAL 
B) condensation of PGAL and fermentation 
C) aerobic processes using Krebs cycle,fermentation 
D) anaerobic processing using Krebs cycle,fermentation 
E) aerobic processing using Krebs cycle,hydrolysis of PGAL 
A) fermentation,hydrolysis of PGAL 
B) condensation of PGAL and fermentation 
C) aerobic processes using Krebs cycle,fermentation 
D) anaerobic processing using Krebs cycle,fermentation 
E) aerobic processing using Krebs cycle,hydrolysis of PGAL

Question 2

Electrochemical gradients have both a(n)_________ and a(n)__________ component.

Accepted Answer

A) concentration,acidic 
B) acidic,electrical 
C) concentration,basic 
D) concentration,electrical 
E) acidic,basic 
A) concentration,acidic 
B) acidic,electrical 
C) concentration,basic 
D) concentration,electrical 
E) acidic,basic

Question 3

What advantage do the cristae confer on the mitochondria?

Accepted Answer

A) They allow the mitochondria to shrink. 
B) They greatly increase the surface area for aerobic respiration machinery. 
C) They confer resiliency on the cells. 
D) They allow swelling of mitochondria. 
E) They activate the matrix. 
A) They allow the mitochondria to shrink. 
B) They greatly increase the surface area for aerobic respiration machinery. 
C) They confer resiliency on the cells. 
D) They allow swelling of mitochondria. 
E) They activate the matrix.

Question 4

To what is the 2-carbon fragment of acetyl CoA added to make citric acid at the start of the Krebs cycle?

Accepted Answer

A) oxaloacetate 
B) citric acid 
C) succinate 
D) -ketoglutarate 
E) isocitric acid 
A) oxaloacetate 
B) citric acid 
C) succinate 
D) -ketoglutarate 
E) isocitric acid

Question 5

The L conformation of ATP synthase catalytic sites ________.

Accepted Answer

A) has a very low affinity for nucleotides 
B) loosely binds AMP and an inorganic phosphate group 
C) has a very low affinity for proteins 
D) binds ATP,ADP and inorganic phosphate groups tightly 
E) loosely binds ADP and an inorganic phosphate group 
A) has a very low affinity for nucleotides 
B) loosely binds AMP and an inorganic phosphate group 
C) has a very low affinity for proteins 
D) binds ATP,ADP and inorganic phosphate groups tightly 
E) loosely binds ADP and an inorganic phosphate group

Question 6

Which of the following is true of peroxisomes?

Accepted Answer

A) Peroxisomes may contain a dense,crystalline core of oxidative enzymes. 
B) Peroxisomes contain more than 50 enzymes involved in diverse activities. 
C) Peroxisomes contain enzymes that oxidize very-long-chain fatty acids. 
D) Peroxisomes contain the enzyme luciferase,which generates the light emitted by fireflies. 
E) All of these are correct. 
A) Peroxisomes may contain a dense,crystalline core of oxidative enzymes. 
B) Peroxisomes contain more than 50 enzymes involved in diverse activities. 
C) Peroxisomes contain enzymes that oxidize very-long-chain fatty acids. 
D) Peroxisomes contain the enzyme luciferase,which generates the light emitted by fireflies. 
E) All of these are correct.

Question 7

What causes Zellweger's syndrome? What do the peroxisomes of ZS patients look like?

Accepted Answer

Peroxisomes in Zellweger's syndrome pati

Question 8

The inner boundary membrane is particularly rich in which of the following?

Accepted Answer

A) protons 
B) proteins responsible for the import of mitochondrial proteins 
C) Krebs cycle enzymes 
D) enzymes of the glycolytic pathway 
E) glycosaminoglycans 
A) protons 
B) proteins responsible for the import of mitochondrial proteins 
C) Krebs cycle enzymes 
D) enzymes of the glycolytic pathway 
E) glycosaminoglycans

Question 9

The presence of Ca2+ ion transport molecules in the inner mitochondrial membrane is consistent with the mitochondrion's role in _______.

Accepted Answer

A) muscle contraction 
B) regulating cytosolic Ca2+ ion concentration 
C) ATP manufacture 
D) ADP manufacture 
E) control of membrane fusion 
A) muscle contraction 
B) regulating cytosolic Ca2+ ion concentration 
C) ATP manufacture 
D) ADP manufacture 
E) control of membrane fusion

Question 10

A muscle cell is obtained and studied with electron microscopy.The study reveals that it has very few mitochondria.What kind of muscle fiber is it?

Accepted Answer

It is a fast-twitch fiber,sinc

Question 11

What energy source other than ATP hydrolysis do mitochondria,unlike most other organelles,routinely use to power their activities?

Accepted Answer

A) ADP hydrolysis 
B) proton-motive force 
C) Na+ ion gradient 
D) K+ ion gradient 
E) Ca2+ gradient 
A) ADP hydrolysis 
B) proton-motive force 
C) Na+ ion gradient 
D) K+ ion gradient 
E) Ca2+ gradient

Question 12

What is the purpose of uncoupling proteins in mammalian brown adipose tissue?

Accepted Answer

A) They give the tissue its color. 
B) They help the tissue expand and contract when needed. 
C) They function as a source of heat production during exposure to cold temperatures. 
D) They allow the production of a larger number of ATPs per glucose. 
E) They allow muscles to contract more efficiently. 
A) They give the tissue its color. 
B) They help the tissue expand and contract when needed. 
C) They function as a source of heat production during exposure to cold temperatures. 
D) They allow the production of a larger number of ATPs per glucose. 
E) They allow muscles to contract more efficiently.

Question 13

Why are molecules that block oxidative phosphorylation and the electron transfer chain such dangerous and potentially deadly poisons?

Accepted Answer

By blocking the electron transport chain

Question 14

What is defined as a domain of the inner mitochondrial membrane that is present within the interior of the mitochondrion as a series of invaginated membranous sheets?

Accepted Answer

A) inner boundary membrane 
B) outer boundary membrane 
C) cristae 
D) matrix 
E) pseudopodia 
A) inner boundary membrane 
B) outer boundary membrane 
C) cristae 
D) matrix 
E) pseudopodia

Question 15

What is the final electron acceptor in the electron transport chain?

Accepted Answer

A) water 
B) carbon dioxide 
C) carbon monoxide 
D) hydrogen 
E) oxygen 
A) water 
B) carbon dioxide 
C) carbon monoxide 
D) hydrogen 
E) oxygen

In what ways can pyruvate and NADH be metabolized?

Electrochemical gradients have both a(n)_ and a(n)__ component.

What advantage do the cristae confer on the mitochondria?

To what is the 2-carbon fragment of acetyl CoA added to make citric acid at the start of the Krebs cycle?

The L conformation of ATP synthase catalytic sites ________.

Which of the following is true of peroxisomes?

What causes Zellweger's syndrome? What do the peroxisomes of ZS patients look like?

The inner boundary membrane is particularly rich in which of the following?

The presence of Ca²⁺ ion transport molecules in the inner mitochondrial membrane is consistent with the mitochondrion's role in _______.

A muscle cell is obtained and studied with electron microscopy.The study reveals that it has very few mitochondria.What kind of muscle fiber is it?

What energy source other than ATP hydrolysis do mitochondria,unlike most other organelles,routinely use to power their activities?

What is the purpose of uncoupling proteins in mammalian brown adipose tissue?

Why are molecules that block oxidative phosphorylation and the electron transfer chain such dangerous and potentially deadly poisons?

What is defined as a domain of the inner mitochondrial membrane that is present within the interior of the mitochondrion as a series of invaginated membranous sheets?

What is the final electron acceptor in the electron transport chain?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Exam 5: Aerobic Respiration and the Mitochondrion

In what ways can pyruvate and NADH be metabolized?

Electrochemical gradients have both a(n)_________ and a(n)__________ component.

What advantage do the cristae confer on the mitochondria?

To what is the 2-carbon fragment of acetyl CoA added to make citric acid at the start of the Krebs cycle?

The L conformation of ATP synthase catalytic sites ________.

Which of the following is true of peroxisomes?

What causes Zellweger's syndrome? What do the peroxisomes of ZS patients look like?

The inner boundary membrane is particularly rich in which of the following?

The presence of Ca2+ ion transport molecules in the inner mitochondrial membrane is consistent with the mitochondrion's role in _______.

A muscle cell is obtained and studied with electron microscopy.The study reveals that it has very few mitochondria.What kind of muscle fiber is it?

What energy source other than ATP hydrolysis do mitochondria,unlike most other organelles,routinely use to power their activities?

What is the purpose of uncoupling proteins in mammalian brown adipose tissue?

Why are molecules that block oxidative phosphorylation and the electron transfer chain such dangerous and potentially deadly poisons?

What is defined as a domain of the inner mitochondrial membrane that is present within the interior of the mitochondrion as a series of invaginated membranous sheets?

What is the final electron acceptor in the electron transport chain?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Gene Expression: From Transcription to Translation

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters

Electrochemical gradients have both a(n)_ and a(n)__ component.

The presence of Ca²⁺ ion transport molecules in the inner mitochondrial membrane is consistent with the mitochondrion's role in _______.