Which vector can clone only a small fragment of DNA

Options

A. Plasmid
B. Cosmid
C. Bacterial artificial chromosome
D. Yeast artificial chromosome

Answer

A

Explanation

Chang and Cohen first proved the use of plasmid as gene cloning vectors. Small size 1.2 – 3 kbp Plasmid – 0.5 – 3 kbp , Cosmia – 35 – 45 kb BAC – 100 – 300 kb, YAC – 200 – 2000 kb