Selection of recombinants can be done by [1]
a) Microinjection technique
b) Insertional inactivation
c) Gel electrophoresis
c) Biolistic method

Q. What is Recombinant D.N.A. ? Explain the process of separation and isolation of D.N.A fragment by gel electrophoresis technique.

Q. For selection of recombinants, insertional inactivation of antibiotic marker has been superseded by insertional inactivation of a marker gene coding for a chromogenic substrate. Give reasons.

Q. (a) A recombinant vector with a gene of interest inserted within the gene of $\alpha$-galactosidase enzyme, is introduced into a bacterium. Explain the method that would help in selection of recombinant colonies from non-recombinant ones.
(b) Why is this method of selection referred to as "insertional inactivation"?

Q. The technique of gel electrophoresis was developed by

Q. Which does not apply to the technique known as gel electrophoresis?