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

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes1 Mark
MCQ
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.
Assertion: Type  restriction endonucleases are not used in recombinant $\text{DNA}$ technology.
Reason: Type  restriction endonucleases recognise specific sites within the $\text{DNA}$ but do not cut these sites.
  • ✓
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    Assertion is true but reason is false.
  • D
    Both assertion and reason are false.
✓

Answer

Correct option: A.
Both assertion and reason are true and reason is the correct explanation of assertion.
Restriction endonuclease are enzymes that cleaves $\text{DNA}$ at specific sites along the molecule. Type I restriction enzyme recognises specific $\text{DNA}$ 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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