cytoskeleton

Question 1

function of cytoskeleton

Answer 1

a network of fibres necessary for shape and stability of the cell

Question 2

what are the three components of cytoskeleton

Answer 2

microfilaments
microtubules
intermediate

Question 3

functions of cytoskeleton

Answer 3

supports the cell’s organelles, keeping them in position
strengthen the cell
maintain the cell’s shape
responsible for movement of materials within the cell
proteins for movement of materials within the cell
proteins of cytoskeleton can also cause the cell to move

Question 4

structure of microfilament

Answer 4

small solid strands
each one is around 7nm diameter
protein = actin

Question 5

function of microfilament

Answer 5

responsible for cell movement and cell contraction during cytokinesis
involved in phagocytosis

Question 6

function of microtubules

Answer 6

act as tracks for the movement of organelles around the cel
make up spindle fibres, centrioles, cilia and flagella

Question 7

structure of microtubules

Answer 7

tiny proteins cylinders - straight and hollow
around 18-30 nm in diameter

Question 8

cellular movement

Answer 8

accomplished by cilia and undulipodia

Question 9

structure of intermediate fibres

Answer 9

average 10nm diameter

Question 10

function of intermediate fibres

Answer 10

give mechanical strength to cells and help maintain their integrity

Question 11

what is motor proteins

Answer 11

molecular motors that use the cytoskeleton to move along the cytoplasm of a cell

Question 12

what is the motor protein for microfilaments

Answer 12

myosin, allows muscle contraction when it interacts with actin

Question 13

what is the motor proteins for microtubules

Answer 13

dynein , allows cilia/flagella movement when it interacts with tubulin
kinesin, move vesicles when interacts with tubulin

Question 14

what are the consequences of defective dynein

Answer 14

cause male infertility and also lead to respiratory tract and sinus problems