Question

Once the double stranded molecule with the mutation is introduced into E. coli for replication, how many types of molecules are produced?

(a) 1

(b) 2

(c) 3

(d) 4

I have been asked this question in semester exam.

Query is from Mutagenesis without PCR topic in division Modifications and Mutagenesis of Genetic Engineering

Answer 1

Right choice is (b) 2

Easiest explanation: Once the double stranded molecule with the mutation is introduced into E. coli for replication, there are basically two types of molecules produced after replication. One is the wild type molecule and the other is having mutated sequence.