Question

Gel electrophoresis is used for

(a) construction of recombinant DNA by joining with cloning vectors 

(b) isolation of DNA molecules 

(c) cutting of DNA into fragments 

(d) separation of DNA fragments according to their size

Answer 1

Correct option (d) separation of DNA fragments according to their size

Explanation:

When genomic DNA extracted from any tissue of a plant or animal species is digested with a restriction enzyme, it is cleaved into segments. The segments of different sizes can be separated through gel electrophoresis, Gel electrophoresis involves movement of fragments or molecules from a well created on one edge of the gel.