Question 1

________ are proteins that promote depolymerization of extant microtubules at the ends.

Accepted Answer

Catastroph

Question 2

Which of the following is not a cellular activity associated with microtubules?

Accepted Answer

A) maintenance of axons 
B) cell shape 
C) orientation of cellulose microfibrils 
D) cilial structure 
E) mititotic spindle 
A) maintenance of axons 
B) cell shape 
C) orientation of cellulose microfibrils 
D) cilial structure 
E) mititotic spindle

Question 3

________ causes microtubules to form tight bundles in nerve cells.

Accepted Answer

A) Dynein 
B) Actin 
C) Tau 
D) Kinesis 
E) Tubulin 
A) Dynein 
B) Actin 
C) Tau 
D) Kinesis 
E) Tubulin

Question 4

All of the following are moved by molecular motors except

Accepted Answer

A) secretory vesicles. 
B) cytoskeletal filaments. 
C) the Golgi complex. 
D) glucose. 
E) chloroplasts. 
A) secretory vesicles. 
B) cytoskeletal filaments. 
C) the Golgi complex. 
D) glucose. 
E) chloroplasts.

Question 5

Cytoskeletal elements are found in the

Accepted Answer

A) Eubacteria. 
B) Archaea. 
C) Eukarya. 
D) choices B and C only 
E) all of the above 
A) Eubacteria. 
B) Archaea. 
C) Eukarya. 
D) choices B and C only 
E) all of the above

Question 6

Choose the item that best matches the other items.
-microtubule-associated proteins (MAPs)

Accepted Answer

A) breaking and capping actin 
B) increase cellular surface area 
C) assembly and disassembly 
D) terminal web 
E) control microtubule organization
F)plectin
G)central shaft
H)nucleating actin branches
I)bind to profilin and CapZ
J)oligomer formation
K)nucleating tubulin branches
L)hemidesmosome
M)decorate the actin microfilament
N)dynein
O)prevents loss of subunits
P)desmosome  
Q)nuclear lamina  
R)account for 10-15% of microtubules  
S)inhibits microtubule assembly  
T)two identical polypeptides joined end-to-end  
U)found in cilia and flagella 
A) breaking and capping actin 
B) increase cellular surface area 
C) assembly and disassembly 
D) terminal web 
E) control microtubule organization
F)plectin
G)central shaft
H)nucleating actin branches
I)bind to profilin and CapZ
J)oligomer formation
K)nucleating tubulin branches
L)hemidesmosome
M)decorate the actin microfilament
N)dynein
O)prevents loss of subunits
P)desmosome  
Q)nuclear lamina  
R)account for 10-15% of microtubules  
S)inhibits microtubule assembly  
T)two identical polypeptides joined end-to-end  
U)found in cilia and flagella

Question 7

The ________ model was proposed by Mitchison and Kirschner to explain how polymerization and depolymerization of microtubules occur simultaneously.

Accepted Answer

The answer of The ________ model was proposed by Mitchison...

Question 8

Choose the item that best matches the other items.
-myosin subfragment 1 (S1)

Accepted Answer

A) breaking and capping actin 
B) increase cellular surface area 
C) assembly and disassembly 
D) terminal web 
E) control microtubule organization
F)plectin
G)central shaft
H)nucleating actin branches
I)bind to profilin and CapZ
J)oligomer formation
K)nucleating tubulin branches
L)hemidesmosome
M)decorate the actin microfilament
N)dynein
O)prevents loss of subunits
P)desmosome  
Q)nuclear lamina  
R)account for 10-15% of microtubules  
S)inhibits microtubule assembly  
T)two identical polypeptides joined end-to-end  
U)found in cilia and flagella 
A) breaking and capping actin 
B) increase cellular surface area 
C) assembly and disassembly 
D) terminal web 
E) control microtubule organization
F)plectin
G)central shaft
H)nucleating actin branches
I)bind to profilin and CapZ
J)oligomer formation
K)nucleating tubulin branches
L)hemidesmosome
M)decorate the actin microfilament
N)dynein
O)prevents loss of subunits
P)desmosome  
Q)nuclear lamina  
R)account for 10-15% of microtubules  
S)inhibits microtubule assembly  
T)two identical polypeptides joined end-to-end  
U)found in cilia and flagella

Question 9

Choose the item that best matches the other items.
-polyphosphoinositides

Accepted Answer

A) breaking and capping actin 
B) increase cellular surface area 
C) assembly and disassembly 
D) terminal web 
E) control microtubule organization
F)plectin
G)central shaft
H)nucleating actin branches
I)bind to profilin and CapZ
J)oligomer formation
K)nucleating tubulin branches
L)hemidesmosome
M)decorate the actin microfilament
N)dynein
O)prevents loss of subunits
P)desmosome  
Q)nuclear lamina  
R)account for 10-15% of microtubules  
S)inhibits microtubule assembly  
T)two identical polypeptides joined end-to-end  
U)found in cilia and flagella 
A) breaking and capping actin 
B) increase cellular surface area 
C) assembly and disassembly 
D) terminal web 
E) control microtubule organization
F)plectin
G)central shaft
H)nucleating actin branches
I)bind to profilin and CapZ
J)oligomer formation
K)nucleating tubulin branches
L)hemidesmosome
M)decorate the actin microfilament
N)dynein
O)prevents loss of subunits
P)desmosome  
Q)nuclear lamina  
R)account for 10-15% of microtubules  
S)inhibits microtubule assembly  
T)two identical polypeptides joined end-to-end  
U)found in cilia and flagella

Question 10

One of the following drugs blocks cell division because it stabilizes the microtubules.What is this drug,and for what is it used?

Accepted Answer

A) vincristine; bacterial infections 
B) vinblastine; antimitotic therapy 
C) taxol; breast cancer 
D) nocodazole; allergies 
E) benzimidazole; colchicine 
A) vincristine; bacterial infections 
B) vinblastine; antimitotic therapy 
C) taxol; breast cancer 
D) nocodazole; allergies 
E) benzimidazole; colchicine

Question 11

You have discovered a new cytoskeletal element and need to identify and characterize it for further work.How would you go about examining this protein to ultimately classify it as a cytoskeletal element?

Accepted Answer

First,identify the subunit and determine

Question 12

Match between columns
                        Premises: capping protein
nonmotor MAP
motor MAP
linker proteins

Accepted Answer

The Answer of CapB and Tau and spectrin and alpha is...

Question 13

A unique feature of ________ is that they are tissue specific.

Accepted Answer

intermedia

Question 14

Which of the following is not a function of the cytoskeleton?

Accepted Answer

A) cell movement 
B) cell division 
C) moving of organelles 
D) positioning of enzymes 
E) passive transport 
A) cell movement 
B) cell division 
C) moving of organelles 
D) positioning of enzymes 
E) passive transport

________ are proteins that promote depolymerization of extant microtubules at the ends.

Which of the following is not a cellular activity associated with microtubules?

________ causes microtubules to form tight bundles in nerve cells.

All of the following are moved by molecular motors except

Cytoskeletal elements are found in the

Choose the item that best matches the other items. -microtubule-associated proteins (MAPs)

The ________ model was proposed by Mitchison and Kirschner to explain how polymerization and depolymerization of microtubules occur simultaneously.

Choose the item that best matches the other items. -myosin subfragment 1 (S1)

Choose the item that best matches the other items. -polyphosphoinositides

One of the following drugs blocks cell division because it stabilizes the microtubules.What is this drug,and for what is it used?

You have discovered a new cytoskeletal element and need to identify and characterize it for further work.How would you go about examining this protein to ultimately classify it as a cytoskeletal element?

A unique feature of ________ is that they are tissue specific.

Which of the following is not a function of the cytoskeleton?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure, function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters

Exam 15: Cytoskeletal Systems

________ are proteins that promote depolymerization of extant microtubules at the ends.

Which of the following is not a cellular activity associated with microtubules?

________ causes microtubules to form tight bundles in nerve cells.

All of the following are moved by molecular motors except

Cytoskeletal elements are found in the

Choose the item that best matches the other items. -microtubule-associated proteins (MAPs)

The ________ model was proposed by Mitchison and Kirschner to explain how polymerization and depolymerization of microtubules occur simultaneously.

Choose the item that best matches the other items. -myosin subfragment 1 (S1)

Choose the item that best matches the other items. -polyphosphoinositides

One of the following drugs blocks cell division because it stabilizes the microtubules.What is this drug,and for what is it used?

You have discovered a new cytoskeletal element and need to identify and characterize it for further work.How would you go about examining this protein to ultimately classify it as a cytoskeletal element?

A unique feature of ________ is that they are tissue specific.

Which of the following is not a function of the cytoskeleton?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Membranes: Their Structure, function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

Filters