Question

If a small intermediate vector system is used along with a selectable marker, then it is called as __________

(a) fusion plasmids

(b) hybrid plasmids

(c) co-integrative plasmids

(d) complex plasmids

The question was asked by my school principal while I was bunking the class.

My doubt stems from Vascular Plants topic in chapter Using Other Organisms of Genetic Engineering

Answer 1

Correct answer is (c) co-integrative plasmids

To elaborate: Tumour inducing plasmids are very large in size and thus they can be manipulated easily. In order to overcome this, small integrating plasmids with a selectable marker are used and it is known as co-integrative plasmid. They are then further inserted into the bacterium.