SSC General Science & Technology Sample Paper NCERT Sample Paper-7

  • question_answer
    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,

You need to login to perform this action.
You will be redirected in 3 sec spinner