Question 1

Tubulin subunits are added to growing cilia or flagella by ________.

Accepted Answer

intraflage

Question 2

Which of the following major protein components of skeletal muscle is incorrectly matched with its function?

Accepted Answer

A) titin-links thick filaments at Z line 
B) nebulin-links thin filaments at Z line 
C) myomesin-myosin binding protein present at M line 
D) troponin-binds along the length of the thin filaments and covers myosin binding sites 
E) actin-major component of thin filaments 
A) titin-links thick filaments at Z line 
B) nebulin-links thin filaments at Z line 
C) myomesin-myosin binding protein present at M line 
D) troponin-binds along the length of the thin filaments and covers myosin binding sites 
E) actin-major component of thin filaments

Question 3

You identify a protein that may play a role in microtubule-based transport.Propose a series of experiments that would aid you in confirming your assessment that this protein has a role in microtubule-based transport.

Accepted Answer

Although answers will vary,some possibil

Question 4

Troponin is a complex of three polypeptide chains called ________,________,and ________.

Accepted Answer

The answer of Troponin is a complex of three polypeptide...

Question 5

The crawling displayed by many embryonic cells in animals involves distinct events.Which of the following sequences places these events in correct order?

Accepted Answer

A) protrusion at the cell's leading edge, attachment of protrusion, pulling the cell forward, release and retraction of trailing edge 
B) attachment of protrusion, pulling the cell forward, protrusion at the cell's leading edge, release and retraction of trailing edge 
C) release and retraction of protrusion, protrusion at the cell's leading edge, attachment of trailing edge, pulling the cell forward 
D) attachment of protrusion, protrusion at the cell's leading edge, pulling the cell forward, release and retraction of trailing edge 
E) pulling the cell forward, release and retraction of protrusion, protrusion at the cell's leading edge, attachment of trailing edge 
A) protrusion at the cell's leading edge, attachment of protrusion, pulling the cell forward, release and retraction of trailing edge 
B) attachment of protrusion, pulling the cell forward, protrusion at the cell's leading edge, release and retraction of trailing edge 
C) release and retraction of protrusion, protrusion at the cell's leading edge, attachment of trailing edge, pulling the cell forward 
D) attachment of protrusion, protrusion at the cell's leading edge, pulling the cell forward, release and retraction of trailing edge 
E) pulling the cell forward, release and retraction of protrusion, protrusion at the cell's leading edge, attachment of trailing edge

Question 6

Mutations in myosin VII result in an autosomal recessive disorder called ________ ,which is characterized by congenital profound hearing loss,problems in the vestibular system,and retinitis pigmentosum.

Accepted Answer

Usher's sy

Question 7

In addition to microtubule motor proteins,________ are also involved in vesicular transport.

Accepted Answer

A) nonmuscle myosins 
B) actin 
C) tubulin 
D) leptin 
E) dyesins 
A) nonmuscle myosins 
B) actin 
C) tubulin 
D) leptin 
E) dyesins

Question 8

In relaxed muscle,calcium is found in high concentration in the

Accepted Answer

A) myofibril. 
B) T tubules. 
C) sacroplasmic reticulum. 
D) sarcolemma. 
E) neuromuscular junction. 
A) myofibril. 
B) T tubules. 
C) sacroplasmic reticulum. 
D) sarcolemma. 
E) neuromuscular junction.

Question 9

During the sliding process in microtubules,the stalks of the dynein attach to and detach from the ________ in a cyclic manner.

Accepted Answer

A) A tubule 
B) B tubule 
C) radial spoke 
D) interdoublet nexin connections 
E) central pair 
A) A tubule 
B) B tubule 
C) radial spoke 
D) interdoublet nexin connections 
E) central pair

Question 10

Discuss how stereocilia work in the organ of Corti and how some chemotherapeutic agents and aminoglycoside antibiotics result in deafness.

Accepted Answer

Stereocilia are actin-rich structures th

Question 11

Compare the sustained contraction of muscle cells in rigor mortis with that which results from the action of tetanospasmin (tetanus toxin)on motor neurons.

Accepted Answer

In the case of rigor mortis,the ATP supp

Question 12

All of the following diseases are classified as ciliopathies except

Accepted Answer

A) Kartagener's triad. 
B) BardetBieldl syndrome. 
C) MeckelGruber syndrome. 
D) Griscelli's disease. 
E) polycystic kidney disease. 
A) Kartagener's triad. 
B) BardetBieldl syndrome. 
C) MeckelGruber syndrome. 
D) Griscelli's disease. 
E) polycystic kidney disease.

Question 13

The ________ account for 1015% of microtubules.

Accepted Answer

microtubul

Question 14

During cell crawling,the cell must attach to the substrate upon which it is crawling.One group of attachment proteins is the ________.

Accepted Answer

A) actins 
B) actomyosins 
C) creatines 
D) integrins 
E) titins 
A) actins 
B) actomyosins 
C) creatines 
D) integrins 
E) titins

Question 15

The calcium pump or calcium ATPase

Accepted Answer

A) is responsible for removing calcium from the T tubule. 
B) increases the level of calcium in the axon terminal. 
C) is a passive process. 
D) removes calcium from the sarcoplasm. 
E) increases bone density. 
A) is responsible for removing calcium from the T tubule. 
B) increases the level of calcium in the axon terminal. 
C) is a passive process. 
D) removes calcium from the sarcoplasm. 
E) increases bone density.

Question 16

________ is a directional movement in response to a graded chemical stimulus.

Accepted Answer

The answer of ________ is a directional movement in response...

Question 17

To carry out their function,kinesin family proteins must attach to their respective

Accepted Answer

A) dynein. 
B) cargo. 
C) adaptor proteins. 
D) only choices B and C 
E) choices A, B, and C 
A) dynein. 
B) cargo. 
C) adaptor proteins. 
D) only choices B and C 
E) choices A, B, and C

Question 18

When migrating cells move toward a greater concentration of a diffusible chemical,the chemical is called a ________.

Accepted Answer

The answer of When migrating cells move toward a greater...

Question 19

All of the following are actin-dependent nonmuscle motility except

Accepted Answer

A) translocation of multienzyme complexes. 
B) pinching off of the cleavage furrow in cytokinesis. 
C) chemotaxis. 
D) cyclosis or cytoplasmic streaming. 
E) amoeboid movement. 
A) translocation of multienzyme complexes. 
B) pinching off of the cleavage furrow in cytokinesis. 
C) chemotaxis. 
D) cyclosis or cytoplasmic streaming. 
E) amoeboid movement.

Question 20

The neuromuscular junction is incorrectly described in which of the following statements?

Accepted Answer

A) Neurotransmitters are stored in vesicles in the axon terminal. 
B) The sarcolemma is the plasma membrane of a muscle cell. 
C) Acetylcholine binds receptors in the synaptic cleft. 
D) T tubules carry action potentials into the muscle cell. 
E) Acetylcholine binding allows sodium ions to enter the muscle cell. 
A) Neurotransmitters are stored in vesicles in the axon terminal. 
B) The sarcolemma is the plasma membrane of a muscle cell. 
C) Acetylcholine binds receptors in the synaptic cleft. 
D) T tubules carry action potentials into the muscle cell. 
E) Acetylcholine binding allows sodium ions to enter the muscle cell.

Exam 16: Cellular Movement: Motility and Contractility

Tubulin subunits are added to growing cilia or flagella by ________.

Which of the following major protein components of skeletal muscle is incorrectly matched with its function?

You identify a protein that may play a role in microtubule-based transport.Propose a series of experiments that would aid you in confirming your assessment that this protein has a role in microtubule-based transport.

Troponin is a complex of three polypeptide chains called ________,________,and ________.

The crawling displayed by many embryonic cells in animals involves distinct events.Which of the following sequences places these events in correct order?

Mutations in myosin VII result in an autosomal recessive disorder called ________ ,which is characterized by congenital profound hearing loss,problems in the vestibular system,and retinitis pigmentosum.

In addition to microtubule motor proteins,________ are also involved in vesicular transport.

In relaxed muscle,calcium is found in high concentration in the

During the sliding process in microtubules,the stalks of the dynein attach to and detach from the ________ in a cyclic manner.

Discuss how stereocilia work in the organ of Corti and how some chemotherapeutic agents and aminoglycoside antibiotics result in deafness.

Compare the sustained contraction of muscle cells in rigor mortis with that which results from the action of tetanospasmin (tetanus toxin)on motor neurons.

All of the following diseases are classified as ciliopathies except

The ________ account for 1015% of microtubules.

During cell crawling,the cell must attach to the substrate upon which it is crawling.One group of attachment proteins is the ________.

The calcium pump or calcium ATPase

________ is a directional movement in response to a graded chemical stimulus.

To carry out their function,kinesin family proteins must attach to their respective

When migrating cells move toward a greater concentration of a diffusible chemical,the chemical is called a ________.

All of the following are actin-dependent nonmuscle motility except

The neuromuscular junction is incorrectly described in which of the following statements?

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

Cytoskeletal Systems

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

Troponin is a complex of three polypeptide chains called ,,and .