A) tubulin
B) humulin
C) intermediate filament
D) flagellin
Correct Answer: A
Solution :
Tubulin' is cytoskeletal globular protein that polymerizes to form 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. Intermediate filaments are tough, rope-like bundles of protein (keratin, desmin, peripherin, vimentin etc).
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