In the year ....a... the two enzymes responsible for ...b... the growth of bacteriophage in E. coli were isolated. One of these added ..c... group to DNA, while other ...d... DNA. The later was called ...e...

Options

A. a - 1963, b - promoting, c -ethyl, d-join, e-DNA ligase
B. a-1963, b-restricting, c-methyl, d-join, e-DNA ligase
C. a-1972, b-restricting, c-methyl, d-cut, e-restriction endonucleases
D. a-1963, b-restricting, c-methyl, d-cut, e-restriction endonuclease

Answer

D

Explanation

In the year 1963 the two enzymes responsible for restricting the growth of bacteriophase in E. coli were isolated. One of these added methyl group of DNA, while other cut DNA. The later was called restriction endonucleases