A) tubulin
B) humulin
C) intermediate filament
D) flagellin
Correct Answer: A
Solution :
Tubulin' is a cytosketal globular protein that polymerizes to forum microtubules. It plays a motile and contractile role in cell structure and in cell division. During cell division, the microtubules radiate from each end of the cell of form a basket like arrangement (the spindle) which helps in the movement of chromosomes to poles. The Principal protein of cilia and flagella is also tubulin. Microtubules play a key role in the movement of cilia and flagella. Intermediate filaments are tough, rope-like bundles of protein (keratin, desmin. peripherin, vimentin etc). Intermediate filaments provide mechanical stability to cells. They interact with microfilaments (made of protein, actin) and microtubules to form cytoskeleton.
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