Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes1 Mark
MCQ
Restriction enzymes are isolated chiefly from ?
A
Algae
B
Fungi
C
Protozoans
✓
Prokaryotes
✓
Answer
Correct option: D.
Prokaryotes
The bacteria $($prokaryotes$)$ contain special types of enzymes called the restriction enzymes.
These enzymes are responsible for cleaving the viral $\text{DNA}$ that enters the bacterial cell for the infection, thereby restricting the growth of the virus particles.
Therefore, these are nucleases.
These do not degrade the $\text{DNA}$ of the bacterial cell because the $\text{DNA}$ is protected by methylation.
Due to their specific cleaving activity, the restriction enzymes are widely used in $\text{rDNA}$ technology.
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