Question

All the following statements about Stanley Cohen and Herbert Boyer are correct but one is wrong. Which one is wrong?
A. They discovered recombinant DNA (rDNA) technology which marked the birth of modern biotechnology.
B. They first produced a healthy sheep clone, a Finn Dorset lamb, Dolly, from the differentiated adult mammary cells
C. They invented genetic engineering by combining a piece of foreign DNA containing a gene from a bacterium with a bacterial (E. coli) plasmid using the enzyme restriction endonuclease.
D. They isolated the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance.

Answer 1

Hint: Recombinant DNA technology is that the joining along of DNA molecules from two completely different species. The recombined deoxyribonucleic acid molecule is inserted into a bunch of organisms to provide new genetic mixtures that are valuable to science, medicine, agriculture, and trade.

Complete answer:
Together with Stanley Cohen, Boyer demonstrated the likelihood of manufacturing deoxyribonucleic acid in microorganisms in \[1973\]. This they did by combining a factor for frog ribosomal polymer with a microorganism inclusion that was then placed into a strain of E. coli for expression. The (recombinant dna|recombinant deoxyribonucleic acid)technology by which DNA fragments from completely different organisms are joined along to provide new genetic mixtures was discovered by Stanley Cohen and Herbert Boyer.
They used restriction endonucleases to digest an inclusion from E. coli and a far off DNA phase and ligated them to provide a recombinant DNA. They discovered antibiotic resistance factor from a bit of deoxyribonucleic acid that was conferring resistance to the recombinant cells to grow in presence of that antibiotic.
Dolly, a Finn Dorset lamb, was created by factor cloning by a geneticist and his co-workers. Hence Stanley Cohen and Herbert Boyer don't seem to be related to the invention of Finn Dorset lamb Dolly. So, the right answer is 'They initially created, healthy sheep clone, a Finn Dorset lamb, Dolly, from the differentiated adult mammary cells'.
Hence, B is the correct option.

Note: The first production of deoxyribonucleic acid molecules, using restriction enzymes, occurred within the early DNA. Researchers at UC metropolis and Stanford used restriction enzymes to chop deoxyribonucleic acid from completely different species at specific sites, and so consolidated the cut strands from the various species back along.