microtubules

Question 1

What are microtubules and where are they found?

Answer 1

components of the cytoskeleton of the cytoplasm

Question 2

Function of microtubules

Answer 2

guide movement during intracellular transport and also help bind internal organelles.

Question 3

Microtubules are found in all cells except….

Answer 3

Red blood cells

Question 4

Describe microtubule structure

Answer 4

cylindrical structure composed of alternating α and β tubulin subunits which polymerize to form protofilaments

Question 5

microtubules are polarised. TRUE/FALSE?

Answer 5

TRUE
- they have a positive and negative end

Question 6

What attachment proteins help to facilitate movement of various organelles around the cell?

Answer 6

dynein and kinesin

Question 7

In which direction do dynein and kinesin move?

Answer 7

Dynein = retrograde fashion
=> down microtubule towards the centre of the cell (+ve → -ve)

kinesin = anterograde
=> away from the centre, towards the periphery (-ve → +ve)