What is the name of a protein that polymerizes into long chains or filaments that form microtubules, hollow fibers that act as a skeletal system for living cells?

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SSC Graduation Level Previous Paper (Held on: 1 Aug 2022 Shift 4)

Answer 1

The correct answer is Tubulin.

Key Points

A microtubule is comprised of tubulin proteins organized to frame an empty, straw-like cylinder, and each tubulin protein comprises two subunits, α-tubulin, and β-tubulin.
Microtubules, similar to actin fibres, are dynamic designs: they can develop and shrivel rapidly by the expansion or expulsion of tubulin proteins.
The tubulin proteins α-and β polymerize into long chains or fibres that structure microtubules, a fundamental component of the eukaryotic cytoskeleton.
Tubulin dimers can depolymerize also as polymerize, and microtubules can go through quick patterns of gathering and dismantling.

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