Question

Plasmids can be classified into how many types depending on the genes present for their transformation?

(a) 1

(b) 2

(c) 3

(d) 4

This question was posed to me during an interview.

Question is taken from Transformation in chapter Basics of Genetic Engineering of Genetic Engineering

Answer 1

The correct choice is (b) 2

The best I can explain: Plasmids can be said as self-mobilizable and mobilizable. They are self mobilizable in the case they contain all the genes necessary to direct its own transfer. Mobilizable are those plasmids which don’t carry all the genes necessary for their transfer but they can be transferred if the genes are present somewhere in the host.