8. Cytoskeleton | November 13, 2024

Question 1

Cytoskeleton is composed molecularly by

Answer 1

Proteins

Question 2

Types of cytoskeleton

Answer 2

1. Microtubules
2. Microfilaments
3. Intermediate filaments

Question 3

Structure of microtubules

Answer 3

1. Protofilaments consisting of alpha, beta tubulin
2. Polar & dynamic

Question 4

Types of microtubules

Answer 4

1. Singlet (13 proteins/protofilaments)
2. Doublet (13x2 proteins/ protofilaments - 3 where they overlap = 23)
3. Triplet (13x3 proteins/protofilaments - 6 where there are two overlaps = 33)

Question 5

The structure of the microtubule has dynamic instability which exists in two forms:

Answer 5

1. Growing
2. Shrinking

Question 6

Microfilament is mainly composed of

Answer 6

Actin