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WBCS Preliminary Examination 2016 — General Studies · Question 122 of 200

Q122
General ScienceBiology
Spindle fibres are made up of
  1. a.flagellin.
  2. b.tubulin.
  3. c.cellulose.
  4. d.chitin.

Answer: (B) tubulin.

Spindle fibres (the mitotic spindle) in cell division are composed of tubulin protein, which polymerises to form microtubules. These pull chromosomes to opposite poles of the cell during mitosis and meiosis. Flagellin makes up bacterial flagella; cellulose is a plant cell wall component; chitin is an exoskeleton component.

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