The first construction of a recombinant DNA molecule (1972) was achiev…

Question

The first construction of a recombinant DNA molecule (1972) was achieved by

Accepted Answer

B. {'text': 'Cohen and Boyer', 'label': 'B'}

1. NCERT credits the first recombinant DNA to Stanley Cohen and Herbert Boyer in 1972.
2. They isolated an antibiotic-resistance gene from a plasmid.
3. Linked it with a native plasmid of Salmonella typhimurium.
4. Transferred it into E. coli, where it replicated using the host's DNA polymerase.
_Source: NCERT Class 12 Biology, Ch 9 "Biotechnology: Principles and Processes", §9.1_

Answer

{'text': 'Watson and Crick', 'label': 'A'}

Answer

{'text': 'Mendel and Morgan', 'label': 'C'}

Answer

{'text': 'Griffith and Avery', 'label': 'D'}