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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: Bacteriophage vectors are more advantageous than plasmid vectors.
Reason: Bacteriophage vectors can be easily detected at the time of cloning experiments.
  • ✓
    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.
Bacteriophage vector have two advantages over plasmid vectors.
$(i).$ They are more efficient than plasmids for the cloning of large $\text{DNA}$ fragments. For example, the largest cloned insert in lambda phage is $24\ kb$ while for plasmid vector it is less than $15\ kb.$
$(ii).$ It is easier to screen a large number of phage plaques than bacterial colonies for identification of recombinant vectors.

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