Question 1

How can the ability of an intermediate filament to stretch be measured?

Accepted Answer

The atomic force microscope (AFM)possess

Question 2

What seems to control the assembly and disassembly of intermediate filaments?

Accepted Answer

A) denaturation 
B) sulfation 
C) phosphorylation and dephosphorylation 
D) hydrolysis 
E) hydroxylation 
A) denaturation 
B) sulfation 
C) phosphorylation and dephosphorylation 
D) hydrolysis 
E) hydroxylation

Question 3

You use a nonionic detergent to extract a cell.When you do,much of the mRNA stays behind with the cytoskeleton,which is not solubilized by this treatment.What do these results mean?

Accepted Answer

A) The cytoskeleton denatures in nonionic detergents. 
B) The mRNA is solubilized by the nonionic detergents. 
C) The mRNA is anchored to the cytoskeleton. 
D) The cytoplasm is anchored to the mRNA. 
E) The cytoskeleton is destabilized by the nonionic detergent. 
A) The cytoskeleton denatures in nonionic detergents. 
B) The mRNA is solubilized by the nonionic detergents. 
C) The mRNA is anchored to the cytoskeleton. 
D) The cytoplasm is anchored to the mRNA. 
E) The cytoskeleton is destabilized by the nonionic detergent.

Question 4

Which of the following could be a method used to label microtubules with a fluorescent dye?

Accepted Answer

A) injecting tubulin with a fluorescent dye 
B) coupling tubulin to a fluorescent dye 
C) coupling actin to a fluorescent dye 
D) inducing a cell to express the gene for tubulin that has been fused to the gene for GFP 
E) coupling tubulin to a fluorescent dye and inducing a cell to express the gene for tubulin that has been fused to the gene for GFP 
A) injecting tubulin with a fluorescent dye 
B) coupling tubulin to a fluorescent dye 
C) coupling actin to a fluorescent dye 
D) inducing a cell to express the gene for tubulin that has been fused to the gene for GFP 
E) coupling tubulin to a fluorescent dye and inducing a cell to express the gene for tubulin that has been fused to the gene for GFP

Question 5

As a fibroblast moves,its leading edge extends from the cell as a broad,flattened,veil-like protrusion called a ________.

Accepted Answer

A) pseudopodium 
B) lamella 
C) lamellipodium 
D) podium 
E) extensor 
A) pseudopodium 
B) lamella 
C) lamellipodium 
D) podium 
E) extensor

Question 6

Which type of cytoskeletal element is described as tough,ropelike fibers composed of a variety of related proteins like keratin?

Accepted Answer

A) microfilaments 
B) microtubules 
C) intermediate filaments 
D) macrofilaments 
A) microfilaments 
B) microtubules 
C) intermediate filaments 
D) macrofilaments

Question 7

What is the direct source of energy that powers molecular motors?

Accepted Answer

A) hydrolysis of GTP 
B) hydrolysis of ATP 
C) proton gradient 
D) H+ gradient 
E) condensation of ATP 
A) hydrolysis of GTP 
B) hydrolysis of ATP 
C) proton gradient 
D) H+ gradient 
E) condensation of ATP

Question 8

How can the rate of movement generated by molecular motors be measured?

Accepted Answer

After attaching MTs to a cover slip,micr

Question 9

What is the name of the densely staining area between the lightly staining areas at the outer edges of a sarcomere?

Accepted Answer

A) A bands 
B) H zones 
C) I bands 
D) Z lines 
E) M lines 
A) A bands 
B) H zones 
C) I bands 
D) Z lines 
E) M lines

Question 10

Which of the following is NOT a function of a cilium?

Accepted Answer

A) moving the cell from place to place 
B) moving fluid and particulate material past the cell 
C) a role in sensory function in monitoring the properties of extracellular fluids 
D) moving vesicles down the nerve cell axon 
E) all of these choices are functions of a cilium 
A) moving the cell from place to place 
B) moving fluid and particulate material past the cell 
C) a role in sensory function in monitoring the properties of extracellular fluids 
D) moving vesicles down the nerve cell axon 
E) all of these choices are functions of a cilium

Question 11

Which of the following is normally associated with the cilia of organisms from protists to mammals?

Accepted Answer

A) a 9 + 0 pattern 
B) a 9 + 1 pattern 
C) a 9 + 2 pattern 
D) microtubules 
E) none of these choices 
A) a 9 + 0 pattern 
B) a 9 + 1 pattern 
C) a 9 + 2 pattern 
D) microtubules 
E) none of these choices

Question 12

Which of the following molecular motors is known to travel in an anterograde direction along microtubules?

Accepted Answer

A) kinesins 
B) dyneins 
C) myosins 
D) kinesins and dyneins 
E) kinesins and myosins 
A) kinesins 
B) dyneins 
C) myosins 
D) kinesins and dyneins 
E) kinesins and myosins

Question 13

Given that axons grow out through the action of microtubules,what should happen to axons growing out from a neuron when they are exposed to colchicine or nocodazole?

Accepted Answer

A) Axons grow more rapidly. 
B) Axonal outgrowth stops. 
C) Axons grow more rapidly 
D) Axonal outgrowth stops 
E) There is no change in axonal outgrowth. 
A) Axons grow more rapidly. 
B) Axonal outgrowth stops. 
C) Axons grow more rapidly 
D) Axonal outgrowth stops 
E) There is no change in axonal outgrowth.

Question 14

What is a major influence in determining the organization and behavior of actin filaments inside cells?

Accepted Answer

A) actinin-binding proteins 
B) tubulin 
C) actin-binding proteins 
D) dynein 
E) actin-binding proteins and dynein 
A) actinin-binding proteins 
B) tubulin 
C) actin-binding proteins 
D) dynein 
E) actin-binding proteins and dynein

Question 15

Using TIRF,scientists have been able to _________________.

Accepted Answer

A) compare the properties of different motor proteins 
B) measure the properties of individual motors under different experimental conditions 
C) ask how a specific mutation of a motor protein affects its motility properties 
D) measure the interrelationships between molecular motor subunits 
E) compare the properties of different motor proteins,measure the properties of individual motors under different experimental conditions and ask how a specific mutation of a motor protein affects its motility properties 
A) compare the properties of different motor proteins 
B) measure the properties of individual motors under different experimental conditions 
C) ask how a specific mutation of a motor protein affects its motility properties 
D) measure the interrelationships between molecular motor subunits 
E) compare the properties of different motor proteins,measure the properties of individual motors under different experimental conditions and ask how a specific mutation of a motor protein affects its motility properties

Question 16

What kinds of forces are thought to hold microtubular structure together?

Accepted Answer

A) strong interactions 
B) noncovalent interactions 
C) covalent interactions 
D) magnetism 
E) strong interactions and covalent interactions 
A) strong interactions 
B) noncovalent interactions 
C) covalent interactions 
D) magnetism 
E) strong interactions and covalent interactions

Question 17

In an attempt to monitor the movement of individual kinesin molecules labeled with GFP along microtubules labeled with a red fluorescent dye using an in vitro motility assay,what specialized type of laser-based fluorescence microscopy would be most likely to be employed?

Accepted Answer

A) FRAP 
B) TIRF 
C) total internal reflection microscopy 
D) atomic force microscopy 
E) TIRF and total internal reflection microscopy 
A) FRAP 
B) TIRF 
C) total internal reflection microscopy 
D) atomic force microscopy 
E) TIRF and total internal reflection microscopy

Question 18

Myofibrils in a muscle cell are made up of a repeating linear array of contractile units called ________.

Accepted Answer

A) sarcocytes 
B) blastomeres 
C) myomeres 
D) sarcomeres 
E) myotubules 
A) sarcocytes 
B) blastomeres 
C) myomeres 
D) sarcomeres 
E) myotubules

Question 19

In stretching an intermediate filament with an atomic force microscope,what properties of an intermediate filament can be tested?

Accepted Answer

A) tensile strength 
B) solidity 
C) brittleness 
D) extensibility 
E) tensile strength and extensibility 
A) tensile strength 
B) solidity 
C) brittleness 
D) extensibility 
E) tensile strength and extensibility

Question 20

What is the name of the lightly staining areas at the outer edges of a sarcomere?

Accepted Answer

A) A bands 
B) H zones 
C) I bands 
D) Z lines 
E) M lines 
A) A bands 
B) H zones 
C) I bands 
D) Z lines 
E) M lines

How can the ability of an intermediate filament to stretch be measured?

What seems to control the assembly and disassembly of intermediate filaments?

You use a nonionic detergent to extract a cell.When you do,much of the mRNA stays behind with the cytoskeleton,which is not solubilized by this treatment.What do these results mean?

Which of the following could be a method used to label microtubules with a fluorescent dye?

As a fibroblast moves,its leading edge extends from the cell as a broad,flattened,veil-like protrusion called a ________.

Which type of cytoskeletal element is described as tough,ropelike fibers composed of a variety of related proteins like keratin?

What is the direct source of energy that powers molecular motors?

How can the rate of movement generated by molecular motors be measured?

What is the name of the densely staining area between the lightly staining areas at the outer edges of a sarcomere?

Which of the following is NOT a function of a cilium?

Which of the following is normally associated with the cilia of organisms from protists to mammals?

Which of the following molecular motors is known to travel in an anterograde direction along microtubules?

Given that axons grow out through the action of microtubules,what should happen to axons growing out from a neuron when they are exposed to colchicine or nocodazole?

What is a major influence in determining the organization and behavior of actin filaments inside cells?

Using TIRF,scientists have been able to _________________.

What kinds of forces are thought to hold microtubular structure together?

In an attempt to monitor the movement of individual kinesin molecules labeled with GFP along microtubules labeled with a red fluorescent dye using an in vitro motility assay,what specialized type of laser-based fluorescence microscopy would be most likely to be employed?

Myofibrils in a muscle cell are made up of a repeating linear array of contractile units called ________.

In stretching an intermediate filament with an atomic force microscope,what properties of an intermediate filament can be tested?

What is the name of the lightly staining areas at the outer edges of a sarcomere?

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

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

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

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Exam 9: The Cytoskeleton and Cell Motility

How can the ability of an intermediate filament to stretch be measured?

What seems to control the assembly and disassembly of intermediate filaments?

You use a nonionic detergent to extract a cell.When you do,much of the mRNA stays behind with the cytoskeleton,which is not solubilized by this treatment.What do these results mean?

Which of the following could be a method used to label microtubules with a fluorescent dye?

As a fibroblast moves,its leading edge extends from the cell as a broad,flattened,veil-like protrusion called a ________.

Which type of cytoskeletal element is described as tough,ropelike fibers composed of a variety of related proteins like keratin?

What is the direct source of energy that powers molecular motors?

How can the rate of movement generated by molecular motors be measured?

What is the name of the densely staining area between the lightly staining areas at the outer edges of a sarcomere?

Which of the following is NOT a function of a cilium?

Which of the following is normally associated with the cilia of organisms from protists to mammals?

Which of the following molecular motors is known to travel in an anterograde direction along microtubules?

Given that axons grow out through the action of microtubules,what should happen to axons growing out from a neuron when they are exposed to colchicine or nocodazole?

What is a major influence in determining the organization and behavior of actin filaments inside cells?

Using TIRF,scientists have been able to _________________.

What kinds of forces are thought to hold microtubular structure together?

In an attempt to monitor the movement of individual kinesin molecules labeled with GFP along microtubules labeled with a red fluorescent dye using an in vitro motility assay,what specialized type of laser-based fluorescence microscopy would be most likely to be employed?

Myofibrils in a muscle cell are made up of a repeating linear array of contractile units called ________.

In stretching an intermediate filament with an atomic force microscope,what properties of an intermediate filament can be tested?

What is the name of the lightly staining areas at the outer edges of a sarcomere?

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

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

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