Cytoskeleton

Question 1

Forms cell-surface projections used for sensing and motoring

Answer 1

Actin

Question 2

Commonly used as a motor with myosin

Answer 2

Actin

Question 3

Responsible for the locomotion of the entire cell

Answer 3

Actin

Question 4

Determines the cell surface shape

Answer 4

Actin

Question 5

The filament that underlies the surface membrane

Answer 5

Actin

Question 6

The subunit of Actin

Answer 6

G-Actin, a 375 amino acid polypeptide carrying ATP or ADP

Question 7

Determines the position of organelles in the cell

Answer 7

Microtubule

Question 8

Directs intracellular transport

Answer 8

Microtubule

Question 9

Forms mitotic spindles for cell division

Answer 9

Microtubule

Question 10

Functions for sensing and motoring by creating cilia

Answer 10

Microtubule

Question 11

Can be found in the cytoplasmic array

Answer 11

Microtubule (and found in cilia but thats a giveaway)

Question 12

The subunits of Microtubules are

Answer 12

alpha and beta tubulin, heterodimers each composed of 445-450 amino acids that stack together. beta has GTP, alpha has either GTP or GDP

Question 13

Provides the mechanical strength

Answer 13

Intermediate Filament

Question 14

Provides anchorage sites for chromosomes

Answer 14

Intermediate Filament

Question 15

Holds the epithelial sheets together

Answer 15

Intermediate Filament

Question 16

Can be found in nuclear lamins, the meshwork lining the inner membrane of the nuclear envelope

Answer 16

Intermediate Filament

Question 17

Intermediate Filament subunits are

Answer 17

Non globular; repeated strands; no nucleotide so no structural polarity

Question 18

Thymosin

Answer 18

Actin binding protein; Binds monomers to prevent filament formation

Question 19

Profilin

Answer 19

Actin binding protein; Promotes filament formation

Question 20

Filamin

Answer 20

Actin binding protein; Filament cross-linking and attaching to membranes (like Spectrin)

Question 21

Spectrin

Answer 21

Actin binding protein; Filament cross-linking and attaching to membranes (like Filamin)

Question 22

Kinesin

Answer 22

Microtubule Binding Protein; Induces disassembly

Question 23

Katanin

Answer 23

Microtubule Binding Protein; severs microtubules

Question 24

+TIPS

Answer 24

Microtubule Binding Protein; Associated with plus ends and can link them to other structures

Question 25

Plectin

Answer 25

Microtubule Binding Protein;; links to intermediate filaments