Question

Some vectors carry a mutant form of promoter known as lacUV5 promoter. It carries ______ in the promoter region and _____ the efficiency.

(a) point mutations, decreases

(b) point mutations, increases

(c) frameshift mutations, increases

(d) frameshift mutations, increases

I got this question in an interview for job.

This interesting question is from Promoters topic in chapter Use of Cloned DNA of Genetic Engineering

Answer 1

Right choice is (b) point mutations, increases

To explain I would say: In some vectors, lacUV5 promoter is present. It is a mutant form and carries point mutations which increase the efficiency.