A Collection of Host Cells That House Cloned Fragments Representing

Question

A collection of host cells that house cloned fragments representing expressed genes is a____.  
A) cDNA library.
B) transcribed library.
C) genomic library.
D) RNA library.
E) plasmid library.

Accepted Answer

A collection of host cells that house cloned fragments representing expressed genes is a cDNA (complementary DNA) library. This library contains DNA copies of all the mRNA molecules produced by a particular cell type, allowing researchers to study the genes that are actively being transcribed and translated in that cell type. Genomic libraries, on the other hand, contain DNA fragments representing an organism's entire genome, while RNA libraries contain RNA molecules from a particular cell type or tissue. Plasmid libraries refer to collections of plasmids that contain cloned DNA fragments.