Cytoskeleton quiz

Question 1

The cytoskeleton can be regarded as?

A) Dynamic assembly of actin and tubulin

B) Dynamic assembly of filaments

C) Rigid assembly of filaments

D) Protective layer around cells

E) Rigid skeleton within cells

Question 2

Crawling cells use the dynamic properties of ……… to move?

A) Actin
B) Tubulin
C) Myosin
D) Dynein
E) Kinesin

Question 3

True or false?

Actin exists as a dimer in cells.

Question 4

Formins are actin nucleators for ………

A) Branched actin filaments
B) Linear actin filaments
C) Microtubules
D) Intermediate filaments

Question 5

Microtubules are composed of how many protofilaments?

A) 12
B) 9
C) 2
D) 10
E) None of these

Question 6

What is the energy molecule that drives motor protein function in cells?

A) GDP
B) GTP
C) ATP
D) ADP
E) All of these
F) Would decrease

Question 7

Microtubules are most commonly nucleated from …….

A) α/β tubulin dimers
B) α/β actin dimers
C) Microtubule organising centres
D) The nucleus
E) The cytoplasm

Question 8

Microtubules are tracks for …….

A) Tubulin and kinesin
B) Actin and myosin
C) Dynein and myosin
D) Myosin and kinesin
E) Kinesin and dynein

Question 9

Intermediate filaments provide …… to cells

A) Movement
B) Mechanical strength
C) Tracks for movement of molecules
D) All of these

Question 10

True or false? Intermediate filaments have structural polarity.