Match List I with List II regarding the structure of a chromosome. List I List II A Kinetochore 1 Small fragment B Centromere 2 Primary constriction C Secondary constriction 3 Disc-shaped structure D Satellite 4 Non-staining region Choose the correct answer from the options given below:

Step-by-step solution

Kinetochores are disc-shaped structures present on the sides of the centromere. Thus, A matches with 3. The centromere is the primary constriction of the chromosome which holds two chromatids of a chromosome. Thus, B matches with 2. A secondary constriction is a non-staining region present at a constant location on some chromosomes. Thus, C matches with 4. The satellite is the small fragment of the chromosome that appears beyond the secondary constriction. Thus, D matches with 1. The correct matching is (A)-(3), (B