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Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes1 Mark
Question
Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
  1. Both assertion and reason are true and reason is the correct explanation of assertion.
  2. Both assertion and reason are true but reason is not the correct explanation of assertion.
  3. Assertion is true but reason is false.
  4. Both assertion and reason are false.
Assertion: Type I restriction endonucleases are not used in recombinant DNA technology.
Reason: Type I restriction endonucleases recognise specific sites within the DNA but do not cut these sites.
✓

Answer

  1. Both assertion and reason are true and reason is the correct explanation of assertion.

Explanation:

Restriction endonuclease are enzymes that cleaves DNA at specific sites along the molecule. Type I restriction enzyme recognises specific DNA sequences but make their cut at seemingly random sites that can be as far as 1000 base pair away from the recognition site.

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