Filippi 1

Question 1

True or False: Cytoskeleton filaments are highly conserved.

Answer 1

True

Question 2

Microfilaments are composed of _____.

Answer 2

actin

Question 3

Microtubules are composed of __________.

Answer 3

tubulin

Question 4

True or False: Intermediate filaments are cell-specific.

Answer 4

True

Question 5

True or False: Microfilaments are the most unstable of the three filaments.

Answer 5

False, microtubules are the most unstable and break easily

Question 6

Actin is assembled ______ end to ______ end.

Answer 6

minus, plus

Question 7

True or False: Actin is assembled in one direction.

Answer 7

True

Question 8

Structurally, microtubules are a ______.

Answer 8

dimer

Question 9

In microtubules, __________ is heterodimeric assembly and __________ is homodimeric assembly.

Answer 9

longitudinal, lateral

Question 10

Too much stathmin causes _______ of the polymer.

Answer 10

instability

Question 11

Profilin and thymosin are ________.

Answer 11

adapters

Question 12

Keratin is an ___________.

Answer 12

intermediate filament

Question 13

True or False: Organelles are bound to intermediate filaments.

Answer 13

True, along with microtubules

Question 14

True or False: Signaling molecules free float in the cytoplasm.

Answer 14

False! They’re connected to intermediate filaments