Cytoskeleton 1

Question 1

What is actin made up of ?

Answer 1

Actin

Question 2

What is meshwork responsible for ?

Answer 2

The shape of actin

Question 3

What can be joined together in long chains to create what we call actin filaments ?

Answer 3

Actin Monomers

Question 4

Give an example of something that uses actin

Answer 4

Muscles

Question 5

What is one actin protein referred to ?

Answer 5

A G actin

Question 6

What does every F actin start as ?

Answer 6

3 G actins

Question 7

What is the process called when 3 G actins form a F actin ?

Answer 7

Nucleation

Question 8

Where is actin only made ?

Answer 8

The cytoplasm

Question 9

Where is G actin floating all round ?

Answer 9

Cytoplasm

Question 10

Where is the cytoskeleton located ?

Answer 10

In the cytoplasm

Question 11

How is filament griots influenced ?

Answer 11

Influenced by the amount of g actin in the cytoplasm

Question 12

What do we call a single G actin protein ?

Answer 12

Actin Monomer

Question 13

What is G actin bound to ?

Answer 13

ATP

Question 14

What is ATP used for ?

Answer 14

Energy

Question 15

What is actin filament formation dependent on ?

Answer 15

Energy

Question 16

Why does an actin filament use a lot of energy ?

Answer 16

Because it bound to its own ATP

Question 17

How do we get ATP to ADP ?

Answer 17

We take off a phosphate

Question 18

Should actin filament growth be more regulated or spontaneous?

Answer 18

Regulated

Question 19

How do we regulate actin filament growth ?

Answer 19

We have actin binding proteins that help regulate filament growth when it forms

Question 20

What is ARP2/3 responsible for ?

Answer 20

Branching on a F actin

Question 21

What is ARF involved in ?

Answer 21

Vesicle budding

Question 22

What does ADF mean ?

Answer 22

General term for making actin filaments shorter

Question 23

How do we make a actin filament shorter ?

Answer 23

De-polymerize

Question 24

What do ADFs tend to move ?

Answer 24

Actin filaments from the pointy end to the barbed end

Question 25

What is Treadmilling ?

Answer 25

The removal of a G actin from the pointy end and adding it to the barbed end

Question 26

What does the Actin cytoskeleton do ?

Answer 26

Maintain cell shape

Question 27

What does movement inside a cell typically involve ?

Answer 27

Microtubules

Question 28

What is a cell that is moving from one spot to another likely using ?

Answer 28

Actin

Question 29

What must Actin interact with ?

Answer 29

The plasma membrane

Question 30

Does actin touch the plasma membrane ?

Answer 30

No, it interacts with it by using integral membrane proteins

Question 31

How do we keep a cell in place ?

Answer 31

We anchor the transmembrane protein to the cytoskeleton

Question 32

What is myosin ?

Answer 32

Motor protein that binds actin

Question 33

What do energy do motor proteins help convert ?

Answer 33

Help convert chemical energy into mechanical energy

Question 34

How many domains does myosin have ?

Answer 34

2

Question 35

What is the control ring associated with ?

Answer 35

Cytokinesis

Question 36

What is cytokinesis?

Answer 36

Cell cleavage that takes place after mitosis/myosis

Question 37

What is moving stuff is moving inside the cell ?

Answer 37

Microtubles

Question 38

Why do we create vesicles on the back of a cel from the plasma membrane ?

Answer 38

So we can transport those vesicles all the way through the cell and deposit them on the leading end