Ch. 13: The Cytoskeleton & Cell Movement Online Quiz (MC)

Question 1

In cell movement, branched actin filament growth pushes against the cell membrane. Proteins involved in this process include ___, ___, and ___ ___.

Answer 1

Arp2/3, profilin, WASP proteins

Question 2

___ ___ links the actin bundles to the plasma membrane in the microvilli of intestinal cells.

Answer 2

myosin I

Question 3

___ ___ is involved in muscle contraction.

Answer 3

myosin II

Question 4

Whether a microtubule shrinks or grows is determined by the rate of ___ tubulin addition relative to the rate of tubulin ___ hydrolysis.

Answer 4

GTP-bound, GTP

Question 5

Cilia are ___ projections of the plasma membrane supported by microfilaments.

Answer 5

NOT

Question 6

Cofilin plays a role in the ___ of actin filaments.

Answer 6

disassembly

Question 7

Intermediate filaments, rather than consisting of a single type of protein, can be made up of a number of ___ proteins.

Answer 7

different

Question 8

Kinesin and dynein are ___ motor proteins.

Answer 8

microtubule

Question 9

Actin may be cross-linked into either parallel or ___ bundles.

Answer 9

contractile

Question 10

Cargo such as ___ ___ or ___ ___ bind to the tails of myosin I and myosin V.

Answer 10

membrane vesicles, intermediate filaments

Question 11

The assembly of actin filaments ___ ___ require ATP.

Answer 11

DOES NOT