Polymerase Chain Reaction - Medical Science

Q1:

Genomic libraries are made from

A genomic DNA of an organism

B genomic RNA of an organism

C genomic cDNA of an organism

D genomic mRNA of an organism

ANS:A - genomic DNA of an organism

Explain why if you were to construct a human DNA library to search for novel genes, you will choose to clone the DNA fragment in plasmid or yeast chromosome?

Please answer it.