Multiple choice

Cell division is where a parent cell is divided into 2 or more daughter cells. Typically cell division occurs as part of larger cell cycle. In eukaryotes, it is of 2 types: vegetative (daughter cell is similar to parent cell) & reductive (chromosome number in daughter cell is decreased by half for producing haploid gametes) cell division. Prokaryotes also possess vegetative cell division termed as binary fission.

Colchine arrests either mitotically dividing cell at metaphase by__________.

  1. dislodging chromosomes from fibrous elements of spindle and consequently the chromosome remain confined to equatorial plane

  2. preventing movement of spindle fibers as the result of which chromosomes fail to go to opposite poles

  3. preventing polymerisation of tubulin into microtubules of spindle

  4. destroying contractile property of spindle protein which ultimately coagulates
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C Correct answer
Explanation

Colchine arrests either mitotically dividing cell at metaphase by preventing polymerisation of tubulin into microtubules of spindle.

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