Question

For gene trap vector system, reporter gene and _____ are present. Reporter gene is _____

(a) selectable marker, having promoter

(b) selectable marker, promoterless

(c) helper phage, promoterless

(d) helper phage, having promoter

I had been asked this question in an interview for internship.

The origin of the question is Gene Function and Gene Trapping in portion Use of Cloned DNA of Genetic Engineering

Answer 1

Right choice is (b) selectable marker, promoterless

The explanation is: For gene trap vector system, reporter gene and a selectable marker are present. The reporter gene is promoterless.