Question 1

Which of the following is common to myosins, kinesins, and dyneins?

Accepted Answer

A)  P-loop NTPase 
B)  S1 fragment 
C)  EF-hand domain 
D)  hexameric AAA ATPase 
E)  None of the answers is correct. 
A)  P-loop NTPase 
B)  S1 fragment 
C)  EF-hand domain 
D)  hexameric AAA ATPase 
E)  None of the answers is correct. A

Question 2

Bacterial flagella are polymers composed of 53-kd subunits of a protein called _______________.

Accepted Answer

flagellin

Question 3

The major family(ies) of eukaryotic motor proteins is (are)

Accepted Answer

A)  myosins. 
B)  kinesins. 
C)  dyneins. 
D)  myosins and kinesins. 
E)  All the answers are correct. 
A)  myosins. 
B)  kinesins. 
C)  dyneins. 
D)  myosins and kinesins. 
E)  All the answers are correct. E

Question 4

How does the action of kinesin differ from that of myosin on its track?

Accepted Answer

Myosin binds and releases acti

Question 5

Single molecules of myosin in action were studied using __________________.

Accepted Answer

The answer of Single molecules of myosin in action were...

Question 6

Human spastic paraplegia has been linked to a mutation in

Accepted Answer

A)  myosin family genes. 
B)  kinesin family genes. 
C)  actin family genes. 
D)  dynein family genes. 
E)  None of the answers is correct. 
A)  myosin family genes. 
B)  kinesin family genes. 
C)  actin family genes. 
D)  dynein family genes. 
E)  None of the answers is correct.

Question 7

Is the motion of bacteria deliberate and exact toward a target chemoattractant, or is it random?

Accepted Answer

Bacteria randomly sample various directi

Question 8

How do molecular motors work?

Accepted Answer

Proteins undergo conformationa

Question 9

Bacterial motors differ from eukaryotic ones in that the bacterial motor

Accepted Answer

A)  moves along a polymeric track. 
B)  moves when ATP is hydrolyzed. 
C)  moves when GTP is hydrolyzed. 
D)  spins around a central axis. 
E)  None of the answers is correct. 
A)  moves along a polymeric track. 
B)  moves when ATP is hydrolyzed. 
C)  moves when GTP is hydrolyzed. 
D)  spins around a central axis. 
E)  None of the answers is correct.

Question 10

Briefly describe the structure of myosin.

Accepted Answer

Myosin consists of a long stal

Question 11

The biased random walk of bacteria is the result of swimming with

Accepted Answer

A)  less tumbling when Ca2+ levels are low. 
B)  more tumbling when moving toward a chemorepellant. 
C)  more tumbling when moving toward a chemoatractant. 
D)  more tumbling when ATP binds the flagellar motor. 
E)  None of the answers is correct. 
A)  less tumbling when Ca2+ levels are low. 
B)  more tumbling when moving toward a chemorepellant. 
C)  more tumbling when moving toward a chemoatractant. 
D)  more tumbling when ATP binds the flagellar motor. 
E)  None of the answers is correct.

Question 12

The structure in a bacterial flagellar motor that rotates is referred to as

Accepted Answer

A)  the MS ring. 
B)  flagellin. 
C)  CheY. 
D)  C-ring 
E)  None of the answers is correct. 
A)  the MS ring. 
B)  flagellin. 
C)  CheY. 
D)  C-ring 
E)  None of the answers is correct.

Question 13

Compare the speed of movement of a motile bacterium to a human.

Accepted Answer

The bacterium can move approxi

Question 14

What is the name given to actin monomers?

Accepted Answer

A)  B-actin 
B)  D-actin 
C)  G-actin 
D)  M-actin 
E)  S-actin 
A)  B-actin 
B)  D-actin 
C)  G-actin 
D)  M-actin 
E)  S-actin

Question 15

What is the energy source used to rotate the flagella?

Accepted Answer

A)  ATP 
B)  proton gradient 
C)  beta oxidation 
D)  GTP 
E)  None of the answers is correct. 
A)  ATP 
B)  proton gradient 
C)  beta oxidation 
D)  GTP 
E)  None of the answers is correct.

Question 16

What is the cause of Charcot-Marie-Tooth disease?

Accepted Answer

This neuropathy is c

Question 17

The change in position along a microtubule by the two kinesin monomers is transmitted through a __________________.

Accepted Answer

The answer of The change in position along a microtubule...

Question 18

Energy used to propel molecular motors includes

Accepted Answer

A)  ATP. 
B)  ion gradients. 
C)  heat. 
D)  light. 
E)  ATP and ion gradients. 
A)  ATP. 
B)  ion gradients. 
C)  heat. 
D)  light. 
E)  ATP and ion gradients.

Question 19

A molecule such as glucose that attracts bacteria is known as a _____.

Accepted Answer

A)  chemorepellant 
B)  chemostimulant 
C)  chemoattractant 
D)  chemotactic 
E)  chemostatic 
A)  chemorepellant 
B)  chemostimulant 
C)  chemoattractant 
D)  chemotactic 
E)  chemostatic

Question 20

To what other protein families are myosin, kinesin, and dynein related (in humans)?

Accepted Answer

While amino acid sequences are varied, t

Exam 35: Molecular Motors

Which of the following is common to myosins, kinesins, and dyneins?

Bacterial flagella are polymers composed of 53-kd subunits of a protein called _______________.

The major family(ies) of eukaryotic motor proteins is (are)

How does the action of kinesin differ from that of myosin on its track?

Single molecules of myosin in action were studied using __________________.

Human spastic paraplegia has been linked to a mutation in

Is the motion of bacteria deliberate and exact toward a target chemoattractant, or is it random?

How do molecular motors work?

Bacterial motors differ from eukaryotic ones in that the bacterial motor

Briefly describe the structure of myosin.

The biased random walk of bacteria is the result of swimming with

The structure in a bacterial flagellar motor that rotates is referred to as

Compare the speed of movement of a motile bacterium to a human.

What is the name given to actin monomers?

What is the energy source used to rotate the flagella?

What is the cause of Charcot-Marie-Tooth disease?

The change in position along a microtubule by the two kinesin monomers is transmitted through a __________________.

Energy used to propel molecular motors includes

A molecule such as glucose that attracts bacteria is known as a _____.

To what other protein families are myosin, kinesin, and dynein related (in humans)?

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

Oxidative Phosphorylation

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

Drug Development

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