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

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes1 Mark
MCQ
"Molecular scissors" used in genetic engineering is :
  • A
    Helicase
  • B
    $\text{DNA}$ ligase
  • C
    $\text{DNA}$ polymerase
  • ✓
    Restriction endonuclease
✓

Answer

Correct option: D.
Restriction endonuclease
Restriction endonuclease enzyme is known as the molecular scissor because a restriction enzyme recognizes and cuts the $\text{DNA}$ only at a particular sequence of nucleotides and producing smaller fragments.
Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid $-$ protein complexes.
There are $\text{DNA}$ and $\text{RNA}$ helicases are involved in the unwinding of the nucleic acids.
In molecular biology, $\text{DNA}$ ligase is a specific type of enzyme that facilitates the joining of $\text{DNA}$ strands together by catalyzing the formation of a phosphodiester bond.
The $\text{DNA}$ polymerases are enzymes that create $\text{DNA}$ molecules by assembling nucleotides, the building blocks of $\text{DNA}$.

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