Question

Libraries in which a particular sequence is present in one organism but are absent from another organism, are called as ___________

(a) normalized libraries

(b) subtractive libraries

(c) selective libraries

(d) partial libraries

I have been asked this question in an international level competition.

My enquiry is from Cloning the cDNA and Specialized Libraries topic in chapter Libraries Construction of Genetic Engineering

Answer 1

Right choice is (b) subtractive libraries

Easiest explanation: Sometimes it happens that a particular sequence is present in one organism but is absent from another organism, such libraries are known as subtractive libraries.