Pre-Class Quiz Chapter 10 Questions

Some cell junctions allow materials to pass between adjacent cells so that they work together as a unit. True or False?

True

Which of the following are components of the animal extracellular matrix? a. collagen and laminin b. cellulose and laminin c. pectic and collagen d. lignin and elastin e. lignin and laminin

a

Dynein motor proteins use ATP to: a. carry vesicles along a microfilament within a cell in a minus-to-plus direction b. carry vesicles along a microtubule within a cell in a plus-to-minus direction c. slide along microfilaments to contract muscle cells d. carry vesicles along a microtubule within a cell in a minus-to-plus direction e. carry vesicles along a microfilament within a cell in a plus-to-minus direction

b

In skin, the cells of the epidermis connect to the basal lamina through cellular junctions known as hemidesmosomes. Select the cytoskeletal element that helps maintain the integrity of this connection. a. microtubules b. intermediate filaments c. microfilaments d. both intermediate filaments and microfilaments

b

Which of the following is associated with microtubules? a. adherens junction b. cilia and flagella c. desmosomes

b

Which of the following pairs includes cell junctions that perform similar functions? a. desmosomes and plasmodesmata b. desmosomes and adherens junctions c. tight junctions and desmosomes d. tight junctions and adherens junctions

b

Kinesin motor proteins use ATP to: a. slide along microfilaments to contract muscle cells b. carry vesicles along a microtubule within a cell in a plus-to-minus direction c. carry vesicles along a microtubule within a cell in a minus-to-plus direction d. carry vesicles along a microfilament within a cell in a minus-to-plus direction e. carry vesicles along a microfilament within a cell in a plus-to-minus direction

c

Which of the following is a characteristic shared by integrins and cadherins? a. both facilitate the adhesion of cells to extracellular matrix proteins b. both are peripheral membrane proteins c. the cytoplasmic domains of both proteins are connected to the cytoskeleton d. both are present in adherens junctions, desmosomes, and hemidesmosomes

c

Which one of the following statements about intracellular transport is TRUE? a. kinesin and myosin move substances along microtubules b. kinesin moves substances along microfilaments c. kinesin and dynein move substances along microtubules d. kinesin and dynein move substances along microfilaments

c

Dynein is a motor protein found attached to: a. lamin b. intermediate filaments c. microfilaments d. microtubules

d

The extracellular matrix can influence: a. cell shape b. cell movement c. gene expression d. all of these choices are correct

d

The extracellular matrix is particularly important for which type of tissue? a. nervous b. epithelial c. muscle d. connective

d

Which of the following is a mesh-like attachment between cells formed by binding of transmembrane proteins of one cell to the same protein type on the adjacent cell, preventing substances from passing between cells? a. adherens junction b. desmosome c. hemidesmosome d. tight junction

d

Which of the following statements about intracellular transport is true? a. Myosin and kinesin move substances toward the "minus end" of microtubules and microfilaments, respectively. b. Kinesin and myosin move substances toward the "minus end" of microtubules and microfilaments, respectively. c. Myosin and kinesin move substances toward the "plus end" of microtubules and microfilaments, respectively. d. Kinesin and myosin move substances toward the "plus end" of microtubules and microfilaments, respectively.

d

Dynamic instability is a: a. feature of microtubules and microfilaments b. feature of microfilaments c. universal feature of the cytoskeleton d. feature of intermediate filaments e. feature of microtubules

e

Intermediate filaments: a. have a diameter that is larger than a microfilament, but smaller than a microtubule b. undergo little change in length in comparison to microtubules and microfilaments c. play an important role in preventing skin from tearing by shear stress d. play in important role in maintaining cell shape e. all of these choices are correct

e

The cytoskeleton of animal cells includes: a. actin, microfilaments, and intermediate filaments b. tubulin, microfilaments, and intermediate filaments c. actin, microtubules, and intermediate filaments d. microtubules and microfilaments e. microtubules, microfilaments, and intermediate filaments

e

The extracellular matrix in animals: a. is located exclusively in muscle tissue b. is a meshwork of insoluble fibrous proteins, primarily collagens, that assemble in a double helix c. is attached to cells by gap junctions d. is formed by many types of cells, primarily fibroblasts, on their cell surfaces e. differs from one tissue to the next, affecting the expression of genes in the cells that it surrounds

e

Which type of cell junction prevents the movement of substances through the space between cells? a. hemidesmosomes b. adherens junctions c. gap junctions d. desmosomes e. tight junctions

e