Question

How many methods are there for obtaining the plasmid DNA from the bacteria?

(a) 1

(b) 2

(c) 3

(d) 4

This question was posed to me during an interview for a job.

The doubt is from Purification of Plasmid DNA in chapter Basics of Genetic Engineering of Genetic Engineering

Answer 1

Right option is (b) 2

The explanation is: There are two methods which are used for obtaining the plasmid DNA from the bacteria. They are named as alkaline lysis method and boiling lysis method. They both are having different working principles.