Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Biotechnology Principles and Processes question

2006 · Q45
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Biotechnology Principles and Processes
  5. /2006 · Q45

Biotechnology Principles and Processes question

2006 · Q45

NEETBiologyBiotechnology Principles and ProcessesMCQ+4 / −1
Restriction endonuclease -
  1. A
    Cuts the DNA molecule at specific sites
  2. B
    Synthesizes DNA
  3. C
    Restricts the synthesis of DNA inside the nucleus
  4. D
    Cuts the DNA molecule randomly
View written solutionFree

Correct answer: A

Restriction endonucleases were found by Arber in 1962 in bacteria. They act as “molecular scissors” or chemical scalpels. They recognize the specific base sequence at palindrome sites in DNA duplex and cut its strands. For example, restriction endonuclease EcoRI found in the colon bacteria E. coli recognizes the base sequence GAATTC in DNA duplex and cuts its strands between G and A.

PreviousNext

More from Biotechnology Principles and Processes

  • Two microbes found to be very useful in genetic engineering are-2006 · MCQ
  • Restriction endonucleases :-2004 · MCQ
  • In transgenics expression of transgene in target tissue is determined by :-2004 · MCQ
  • In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution, because : -2003 · MCQ
  • Which one of the following bacteria has found extensive use in genetic engineering work in plants ?2003 · MCQ
  • Manipulation of DNA in genetic engineering became possible due to the discovery of : -2002 · MCQ
  • In lederberg's replica plating experiment what shall be used to obtain streptomycin resistant strain : -2001 · MCQ
  • A mutant strain of T4 – Bacteriophage, R-II, fails to lyse the E-Coli but when two strains RIIX and R-IIY are mixed then they lyse the E.Coli. What may be the possible reason : -2001 · MCQ