| Study the following statements |
| 1. Restriction endonucleases (molecular scissors) are discovered by Nathan and Smith. |
| 2. Restriction endonucleases are used to cut plasmid and foreign DNA. |
| 3. Plasmids are vectors or vehicles in gene transfer. |
| 4. Recombinant DNA technology given by Stanley Cohen and Herbert Boyer. Which of the statements given above are correct? |
A) 1, 2, 3 and 4
B) 2, 3 and 4
C) 1, 2 and 3
D) None of these
Correct Answer: A
Solution :
[a] A restriction enzyme or restriction endonuclease is an enzyme that cuts DNA at or near specific recognition nucleotide sequences known as restriction sites. Recombinant DNA (rDNA) molecules are DNA molecules formed by laboratory /methods of genetic recombination (such as molecular cloning) to bring together genetic material from multiple sources, creating sequences that would not otherwise be found in the genome,
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