Question 1

What is the rate and distance of the movement of myosin heads?

Accepted Answer

A)  Each head moves 5 times per second, approximately 110 Angstroms. 
B)  Each head moves 10 times per second, approximately 10 Angstroms. 
C)  Each head moves 800 times per second, approximately 10 Angstroms. 
D)  Each head moves 800 times per second, approximately 110 Angstroms. 
E)  None of the answers is correct. 
A)  Each head moves 5 times per second, approximately 110 Angstroms. 
B)  Each head moves 10 times per second, approximately 10 Angstroms. 
C)  Each head moves 800 times per second, approximately 10 Angstroms. 
D)  Each head moves 800 times per second, approximately 110 Angstroms. 
E)  None of the answers is correct.

Question 2

What is F-actin?

Accepted Answer

The filamentous form of actin

Question 3

How are flagellin subunits arranged in the bacterial flagellum?

Accepted Answer

Flagellin subunits form helical polymers

Question 4

Myosin light chains are related to the _______________ family of proteins.

Accepted Answer

The answer of Myosin light chains are related to the...

Question 5

Binding of ATP causes ______________.

Accepted Answer

A)  a decrease in myosin head affinity for actin filaments 
B)  an increase in myosin head affinity for actin filaments 
C)  no change in myosin head affinity for actin filaments 
D)  cross-linking of the myosin head and actin filaments 
E)  complete abolition of affinity between actin and myosin 
A)  a decrease in myosin head affinity for actin filaments 
B)  an increase in myosin head affinity for actin filaments 
C)  no change in myosin head affinity for actin filaments 
D)  cross-linking of the myosin head and actin filaments 
E)  complete abolition of affinity between actin and myosin

Question 6

During a muscle contraction, the thin filaments (actin, tropomyosin, troponin) slide along the _________________.

Accepted Answer

thick fila

Question 7

Regulated actin polymerization is central to the changes in

Accepted Answer

A)  shape of macrophages. 
B)  cell motility in amebae. 
C)  flagella movement in bacteria. 
D)  shape of macrophages and cell motility in amebae. 
E)  All the answers are correct. 
A)  shape of macrophages. 
B)  cell motility in amebae. 
C)  flagella movement in bacteria. 
D)  shape of macrophages and cell motility in amebae. 
E)  All the answers are correct.

Question 8

Microtubules are tracks for kinesins and _________________.

Accepted Answer

The answer of Microtubules are tracks for kinesins and _________________....

Question 9

Which of the following was the first kinesin to be discovered?

Accepted Answer

A)  microtubule-linked kinesin 
B)  conventional kinesin 
C)  actin-coupled kinesin 
D)  $\alpha$-kinesin 
E)  AAA kinesin 
A)  microtubule-linked kinesin 
B)  conventional kinesin 
C)  actin-coupled kinesin 
D)  $\alpha$-kinesin 
E)  AAA kinesin

Question 10

Taxol inhibits the proliferation of cells by stabilizing the polymer form of _________________.

Accepted Answer

microtubul

Exam 35: Molecular Motors

What is the rate and distance of the movement of myosin heads?

What is F-actin?

How are flagellin subunits arranged in the bacterial flagellum?

Myosin light chains are related to the _______________ family of proteins.

Binding of ATP causes ______________.

During a muscle contraction, the thin filaments (actin, tropomyosin, troponin) slide along the _________________.

Regulated actin polymerization is central to the changes in

Microtubules are tracks for kinesins and _________________.

Which of the following was the first kinesin to be discovered?

Taxol inhibits the proliferation of cells by stabilizing the polymer form of _________________.

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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