Question 1

What protein is thought to act like a "molecular ruler" by regulating the number of actin monomers that are allowed to assemble into a thin filament?

Accepted Answer

A) troponin 
B) myosin 
C) nebulin 
D) titin 
E) tropomyosin 
A) troponin 
B) myosin 
C) nebulin 
D) titin 
E) tropomyosin

Question 2

Which type of actin-binding protein is known to decrease cytoplasmic viscosity by breaking existing actin filaments into two or more pieces?

Accepted Answer

A) monomer-polymerizing proteins 
B) cross-linking proteins 
C) filament-severing proteins 
D) actin-filament depolymerizing proteins 
E) end-blocking proteins 
A) monomer-polymerizing proteins 
B) cross-linking proteins 
C) filament-severing proteins 
D) actin-filament depolymerizing proteins 
E) end-blocking proteins

Question 3

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 4

Characteristics of Functional Electrical Stimulation (FES)include:

Accepted Answer

A) using an electrode to stimulate muscle contraction 
B) application in assisting patients whose nerves have been severed 
C) application in assisting patients whose nerves have degenerated due to a variety of medical conditions 
D) muscle fatigue issues due to single electrode stimulus 
E) all choices are correct 
A) using an electrode to stimulate muscle contraction 
B) application in assisting patients whose nerves have been severed 
C) application in assisting patients whose nerves have degenerated due to a variety of medical conditions 
D) muscle fatigue issues due to single electrode stimulus 
E) all choices are correct

Question 5

Structures that move from the cell body of a neuron down the axon toward the neuron terminals are said to move in _________ direction.

Accepted Answer

A) retrograde 
B) anterograde 
C) astronomical 
D) radial 
E) intergrade 
A) retrograde 
B) anterograde 
C) astronomical 
D) radial 
E) intergrade

Question 6

If there is no flow of extraembryonic fluid over a mouse embryo, ___________.

Accepted Answer

A) most of the embryos die early in development 
B) the majority of embryos still orient correctly 
C) the left-right asymmetry decision for the embryo is made at random 
D) the majority of embryos exhibit situs inversus 
E) the embryos exhibit no asymmetrical arrangement of organs 
A) most of the embryos die early in development 
B) the majority of embryos still orient correctly 
C) the left-right asymmetry decision for the embryo is made at random 
D) the majority of embryos exhibit situs inversus 
E) the embryos exhibit no asymmetrical arrangement of organs

Question 7

The focal complexes that form near the leading edge of a motile cell exert traction force through their associated __________ and then typically disassemble as the cell moves forward or mature into larger, more contractile focal adhesions.

Accepted Answer

A) microtubules 
B) keratin filaments 
C) vinculin filaments 
D) actin filaments 
E) actinin filaments 
A) microtubules 
B) keratin filaments 
C) vinculin filaments 
D) actin filaments 
E) actinin filaments

Question 8

If you were to fix a fish keratocyte and stain it with fluorescent antibodies for myosin II, where would you see the myosin II?

Accepted Answer

A) in the advancing lamellipodium edge 
B) in the rear of the cell 
C) in a band where the rear of the lamellipodium joins the rest of the cell 
D) around the nucleus 
E) surrounding the mitochondria 
A) in the advancing lamellipodium edge 
B) in the rear of the cell 
C) in a band where the rear of the lamellipodium joins the rest of the cell 
D) around the nucleus 
E) surrounding the mitochondria

Question 9

In cell biology and with respect to microtubules, intermediate filaments, and actin filaments, the word "dynamic" means ________.

Accepted Answer

A) impressive 
B) constant in structure 
C) ever-changing in structure 
D) energetic 
E) forceful 
A) impressive 
B) constant in structure 
C) ever-changing in structure 
D) energetic 
E) forceful

Question 10

Why are taxol, vinblastine and other similar drugs used as chemotherapy agents?

Accepted Answer

A) They preferentially affect actively dividing cells, like tumor cells. 
B) They stabilize tumor cells. 
C) They disrupt tumor cell membranes. 
D) They prevent the entry of cells into the first stage of meiosis. 
E) They inhibit mitochondria. 
A) They preferentially affect actively dividing cells, like tumor cells. 
B) They stabilize tumor cells. 
C) They disrupt tumor cell membranes. 
D) They prevent the entry of cells into the first stage of meiosis. 
E) They inhibit mitochondria.

Question 11

Which MTOC gives rise to cilia and flagella?

Accepted Answer

A) a centrosome 
B) basal bodies 
C) centriole 
D) PCM 
E) the plus end 
A) a centrosome 
B) basal bodies 
C) centriole 
D) PCM 
E) the plus end

Question 12

When the MAP protein tau has abnormally high levels of __________, it is associated with the development of strange, tangled filaments called _________ that have been seen in the brains of patients suffering from several fatal neurodegenerative diseases like Alzheimer's disease.

Accepted Answer

A) phosphorylation, neurofibrillary tangles 
B) phosphorylation, neurofibrillary anastomoses 
C) dephosphorylation, neurofibrillary tangles 
D) dephosphorylation, neurofibrillary anastomoses 
E) amination, neurofibrillary tangles 
A) phosphorylation, neurofibrillary tangles 
B) phosphorylation, neurofibrillary anastomoses 
C) dephosphorylation, neurofibrillary tangles 
D) dephosphorylation, neurofibrillary anastomoses 
E) amination, neurofibrillary tangles

Question 13

The splitting of the cytoplasm of a parent cell into two daughter cells is called ______.

Accepted Answer

A) diakinesis 
B) cytokinesis 
C) mitosis 
D) meiosis 
E) cytomegaly 
A) diakinesis 
B) cytokinesis 
C) mitosis 
D) meiosis 
E) cytomegaly

Question 14

The point at which the neuron axon terminus and the muscle fiber make contact is called the _________.

Accepted Answer

A) neuromuscular terminus 
B) nerve exons 
C) neural conjunctions 
D) neuromuscular junction 
E) neuromuscular conjunction 
A) neuromuscular terminus 
B) nerve exons 
C) neural conjunctions 
D) neuromuscular junction 
E) neuromuscular conjunction

Question 15

Techniques for measuring muscle activity include all of the following EXCEPT:

Accepted Answer

A) placing electrodes on the skin surface close to muscles 
B) placing electrodes into muscle by piercing the skin 
C) detecting vibrations produced by superficial muscles 
D) detecting vibrations produced by deep muscles 
E) all are standard activity-measuring techniques 
A) placing electrodes on the skin surface close to muscles 
B) placing electrodes into muscle by piercing the skin 
C) detecting vibrations produced by superficial muscles 
D) detecting vibrations produced by deep muscles 
E) all are standard activity-measuring techniques

Question 16

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

Accepted Answer

A) actin filaments 
B) microtubules 
C) intermediate filaments 
D) macrofilaments 
E) indeterminate filaments 
A) actin filaments 
B) microtubules 
C) intermediate filaments 
D) macrofilaments 
E) indeterminate filaments

Question 17

Which of the following words best describes the structure of an actin filament?

Accepted Answer

A) single actin strand 
B) triple helix 
C) hyperpolar filament 
D) double helix 
E) supercoil 
A) single actin strand 
B) triple helix 
C) hyperpolar filament 
D) double helix 
E) supercoil

Question 18

The myosin filament is characterized as a(n)_________ filament.

Accepted Answer

A) bipolar 
B) unipolar 
C) tripolar 
D) parallel 
E) orthogonal 
A) bipolar 
B) unipolar 
C) tripolar 
D) parallel 
E) orthogonal

Question 19

Which of the following is NOT a function of cilia?

Accepted Answer

A) moving the cell from place to place 
B) moving fluid and particulate material past the cell 
C) sensing and monitoring the properties of extracellular fluids 
D) moving vesicles down the nerve cell axon 
E) All of these choices are functions of cilia. 
A) moving the cell from place to place 
B) moving fluid and particulate material past the cell 
C) sensing and monitoring the properties of extracellular fluids 
D) moving vesicles down the nerve cell axon 
E) All of these choices are functions of cilia.

Question 20

Motor proteins are able to generate force by ___________.

Accepted Answer

A) undergoing a series of conformational changes 
B) polymerization of protofilaments 
C) deploymerization of protofilaments 
D) adding amino acids to the end of the molecular motor 
E) making bonds AND adding amino acids to the end of the molecular motor 
A) undergoing a series of conformational changes 
B) polymerization of protofilaments 
C) deploymerization of protofilaments 
D) adding amino acids to the end of the molecular motor 
E) making bonds AND adding amino acids to the end of the molecular motor

What protein is thought to act like a "molecular ruler" by regulating the number of actin monomers that are allowed to assemble into a thin filament?

Which type of actin-binding protein is known to decrease cytoplasmic viscosity by breaking existing actin filaments into two or more pieces?

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

Characteristics of Functional Electrical Stimulation (FES)include:

Structures that move from the cell body of a neuron down the axon toward the neuron terminals are said to move in _________ direction.

If there is no flow of extraembryonic fluid over a mouse embryo, ___________.

The focal complexes that form near the leading edge of a motile cell exert traction force through their associated __________ and then typically disassemble as the cell moves forward or mature into larger, more contractile focal adhesions.

If you were to fix a fish keratocyte and stain it with fluorescent antibodies for myosin II, where would you see the myosin II?

In cell biology and with respect to microtubules, intermediate filaments, and actin filaments, the word "dynamic" means ________.

Why are taxol, vinblastine and other similar drugs used as chemotherapy agents?

Which MTOC gives rise to cilia and flagella?

When the MAP protein tau has abnormally high levels of __, it is associated with the development of strange, tangled filaments called _ that have been seen in the brains of patients suffering from several fatal neurodegenerative diseases like Alzheimer's disease.

The splitting of the cytoplasm of a parent cell into two daughter cells is called ______.

The point at which the neuron axon terminus and the muscle fiber make contact is called the _________.

Techniques for measuring muscle activity include all of the following EXCEPT:

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

Which of the following words best describes the structure of an actin filament?

The myosin filament is characterized as a(n)_________ filament.

Which of the following is NOT a function of cilia?

Motor proteins are able to generate force by ___________.

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

Exam 9: The Cytoskeleton and Cell Motility

What protein is thought to act like a "molecular ruler" by regulating the number of actin monomers that are allowed to assemble into a thin filament?

Which type of actin-binding protein is known to decrease cytoplasmic viscosity by breaking existing actin filaments into two or more pieces?

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

Characteristics of Functional Electrical Stimulation (FES)include:

Structures that move from the cell body of a neuron down the axon toward the neuron terminals are said to move in _________ direction.

If there is no flow of extraembryonic fluid over a mouse embryo, ___________.

The focal complexes that form near the leading edge of a motile cell exert traction force through their associated __________ and then typically disassemble as the cell moves forward or mature into larger, more contractile focal adhesions.

If you were to fix a fish keratocyte and stain it with fluorescent antibodies for myosin II, where would you see the myosin II?

In cell biology and with respect to microtubules, intermediate filaments, and actin filaments, the word "dynamic" means ________.

Why are taxol, vinblastine and other similar drugs used as chemotherapy agents?

Which MTOC gives rise to cilia and flagella?

When the MAP protein tau has abnormally high levels of __________, it is associated with the development of strange, tangled filaments called _________ that have been seen in the brains of patients suffering from several fatal neurodegenerative diseases like Alzheimer's disease.

The splitting of the cytoplasm of a parent cell into two daughter cells is called ______.

The point at which the neuron axon terminus and the muscle fiber make contact is called the _________.

Techniques for measuring muscle activity include all of the following EXCEPT:

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

Which of the following words best describes the structure of an actin filament?

The myosin filament is characterized as a(n)_________ filament.

Which of the following is NOT a function of cilia?

Motor proteins are able to generate force by ___________.

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

When the MAP protein tau has abnormally high levels of __, it is associated with the development of strange, tangled filaments called _ that have been seen in the brains of patients suffering from several fatal neurodegenerative diseases like Alzheimer's disease.