Question 1

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 D

Question 2

An abnormally high level of _______ of the MAP protein tau is implicated in 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 A

Question 3

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

Accepted Answer

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

Question 4

Which of the following does not describe the types of microfilament organization normally seen in cells?

Accepted Answer

A) highly ordered arrays 
B) loose,ill-defined networks 
C) tightly anchored bundles 
D) cylindrical conglomerations 
E) all of these choices describe types of microfilament organization 
A) highly ordered arrays 
B) loose,ill-defined networks 
C) tightly anchored bundles 
D) cylindrical conglomerations 
E) all of these choices describe types of microfilament organization

Question 5

What links actin filament barbed ends to the Z line?

Accepted Answer

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

Question 6

To which end of microtubules are tubulin subunits primarily added in vitro?

Accepted Answer

A) the minus end 
B) the N-terminal end 
C) the plus end 
D) the C-terminal end 
E) the 5'-end 
A) the minus end 
B) the N-terminal end 
C) the plus end 
D) the C-terminal end 
E) the 5'-end

Question 7

Which of the following treatments do not disassemble microtubules in living cells?

Accepted Answer

A) slightly elevated temperature 
B) hydrostatic pressure 
C) elevated calcium ion concentration 
D) colchicine or vinblastine treatment 
E) all of these choices disassemble microtubules in living cells 
A) slightly elevated temperature 
B) hydrostatic pressure 
C) elevated calcium ion concentration 
D) colchicine or vinblastine treatment 
E) all of these choices disassemble microtubules in living cells

Question 8

What does treatment of a sperm axoneme with 0.6 M NaCl do to its structure?

Accepted Answer

A) It removes both arms from the A microtubule. 
B) It selectively removes the outer arms from the A microtubule. 
C) It selectively removes the inner arms from the A microtubule. 
D) It selectively removes the outer arms from the B microtubule. 
E) It selectively removes the inner arms from the B microtubule. 
A) It removes both arms from the A microtubule. 
B) It selectively removes the outer arms from the A microtubule. 
C) It selectively removes the inner arms from the A microtubule. 
D) It selectively removes the outer arms from the B microtubule. 
E) It selectively removes the inner arms from the B microtubule.

Question 9

From what structure do cilia and flagella emerge?

Accepted Answer

A) centromeres 
B) basal bodies 
C) centrioles 
D) spindle 
E) MTOC 
A) centromeres 
B) basal bodies 
C) centrioles 
D) spindle 
E) MTOC

Question 10

Where does the energy to run myosin motors come from?

Accepted Answer

A) GTP 
B) ATP 
C) proton gradient 
D) CTP 
E) creatine phosphate 
A) GTP 
B) ATP 
C) proton gradient 
D) CTP 
E) creatine phosphate

Question 11

_________ proteins are able to alter the three-dimensional organization of an actin filament population.

Accepted Answer

A) Monomer-polymerizing 
B) Cross-linking 
C) Filament-severing 
D) Actin-filament depolymerizing 
E) End-blocking 
A) Monomer-polymerizing 
B) Cross-linking 
C) Filament-severing 
D) Actin-filament depolymerizing 
E) End-blocking

Question 12

Which protein below is often a component of intermediate filaments?

Accepted Answer

A) alpha-tubulin 
B) beta-tubulin 
C) actin 
D) keratin 
E) myosin 
A) alpha-tubulin 
B) beta-tubulin 
C) actin 
D) keratin 
E) myosin

Question 13

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 14

Which region of the sarcomere represents the region of overlap between the two types of filaments in the sarcomere?

Accepted Answer

A) A bands 
B) the part of the A band on either side of the H zone 
C) I bands 
D) Z lines 
E) the part of the H zone on either side of the A band 
A) A bands 
B) the part of the A band on either side of the H zone 
C) I bands 
D) Z lines 
E) the part of the H zone on either side of the A band

Question 15

Why does an actin thin filament manage to move continuously during a contraction cycle?

Accepted Answer

A) All of the myosin heads beat synchronously. 
B) All of the myosin heads beat out of synchrony with one another. 
C) They use an enormous amount of ATP. 
D) They use an enormous amount of GTP. 
E) none of these choices 
A) All of the myosin heads beat synchronously. 
B) All of the myosin heads beat out of synchrony with one another. 
C) They use an enormous amount of ATP. 
D) They use an enormous amount of GTP. 
E) none of these choices

Question 16

Which of the following molecular motors is associated with microfilaments?

Accepted Answer

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

Question 17

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

Accepted Answer

A) They preferentially kill tumor cells. 
B) They preferentially stabilize tumor cells. 
C) They disrupt tumor cell membranes. 
D) They prevent entry of cells into the stage of meiosis. 
E) They inhibit mitochondria. 
A) They preferentially kill tumor cells. 
B) They preferentially stabilize tumor cells. 
C) They disrupt tumor cell membranes. 
D) They prevent entry of cells into the stage of meiosis. 
E) They inhibit mitochondria.

Question 18

The central,rod-shaped domain of an intermediate filament is flanked on each side by globular domains of variable size and sequence.What structure forms the core of the central,rod-shaped domain?

Accepted Answer

A) alpha-helix 
B) beta-pleated sheet 
C) double helix 
D) quaternary coil 
E) coiled coil 
A) alpha-helix 
B) beta-pleated sheet 
C) double helix 
D) quaternary coil 
E) coiled coil

Question 19

A microscope is equipped with a laser that can be focused on a small region of the cell.The laser beam is used to bleach fluorescent tubulin in a small region of the cell.The specimen is then followed over time and the recovery of the fluorescent signal into the bleached zone is then measured.What is the name of this technique?

Accepted Answer

A) TIRF 
B) fluorescence recovery after photobleaching 
C) total internal refraction microscopy 
D) FRAP 
E) fluorescence recovery after photobleaching and FRAP 
A) TIRF 
B) fluorescence recovery after photobleaching 
C) total internal refraction microscopy 
D) FRAP 
E) fluorescence recovery after photobleaching and FRAP

Question 20

What is the name of the largest protein yet discovered? It extends from the M line in the center of the sarcomere along the myosin filament and past the A band to terminate at the Z line.

Accepted Answer

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

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

An abnormally high level of _ of the MAP protein tau is implicated in 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.

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

Which of the following does not describe the types of microfilament organization normally seen in cells?

What links actin filament barbed ends to the Z line?

To which end of microtubules are tubulin subunits primarily added in vitro?

Which of the following treatments do not disassemble microtubules in living cells?

What does treatment of a sperm axoneme with 0.6 M NaCl do to its structure?

From what structure do cilia and flagella emerge?

Where does the energy to run myosin motors come from?

_________ proteins are able to alter the three-dimensional organization of an actin filament population.

Which protein below is often a component of intermediate filaments?

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

Which region of the sarcomere represents the region of overlap between the two types of filaments in the sarcomere?

Why does an actin thin filament manage to move continuously during a contraction cycle?

Which of the following molecular motors is associated with microfilaments?

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

The central,rod-shaped domain of an intermediate filament is flanked on each side by globular domains of variable size and sequence.What structure forms the core of the central,rod-shaped domain?

What is the name of the largest protein yet discovered? It extends from the M line in the center of the sarcomere along the myosin filament and past the A band to terminate at the Z line.

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

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

An abnormally high level of _______ of the MAP protein tau is implicated in 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.

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

Which of the following does not describe the types of microfilament organization normally seen in cells?

What links actin filament barbed ends to the Z line?

To which end of microtubules are tubulin subunits primarily added in vitro?

Which of the following treatments do not disassemble microtubules in living cells?

What does treatment of a sperm axoneme with 0.6 M NaCl do to its structure?

From what structure do cilia and flagella emerge?

Where does the energy to run myosin motors come from?

_________ proteins are able to alter the three-dimensional organization of an actin filament population.

Which protein below is often a component of intermediate filaments?

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

Which region of the sarcomere represents the region of overlap between the two types of filaments in the sarcomere?

Why does an actin thin filament manage to move continuously during a contraction cycle?

Which of the following molecular motors is associated with microfilaments?

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

The central,rod-shaped domain of an intermediate filament is flanked on each side by globular domains of variable size and sequence.What structure forms the core of the central,rod-shaped domain?

What is the name of the largest protein yet discovered? It extends from the M line in the center of the sarcomere along the myosin filament and past the A band to terminate at the Z line.

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

An abnormally high level of _ of the MAP protein tau is implicated in 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.