Question

Centromere is required for which of the following?
A. Movement of chromosomes towards poles
B. Cytoplasmic cleavage
C. Crossing over
D. Transcription process

Answer 1

Hint: Centromere is the structure in a chromosome that holds together the two chromatids (the daughter strands of a replicated chromosome).

Complete answer:
Centromere is required for the movement of chromosomes towards the pole.
The word “centromere” is derived from the Greek words Centro (central) and mere (part). It is a constricted region of a chromosome that separates it into a short arm (p) and a long arm (q). It generally lies somewhere between one-third and two-thirds of the length of the chromosome.
The major functions of Centromere are-
1. The centromere of the chromosome provides a binding site for the mitotic spindle fiber that will attach to each sister chromatid.
2. Centromere pulls sister chromatids to opposite ends of the parent cell.
The centromere is also the point of attachment of the kinetochore, a highly complex multi protein structure to which the microtubules of the spindle fibers attach.

So, the correct option is 'Movement of chromosomes towards poles'.

Note: On the basis of the location of the centromere, chromosomes are classified into four types:
1. Metacentric
2. Submetacentric
3. Acrocentric
4. Telocentric