Which of the following does not have direct role in genetic engineering?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Lipase
Option (1) Restriction enzymes — Direct role. Cut DNA at specific sites.
Option (2) Polymerase — Direct role. DNA polymerase is used, as in PCR.
Option (3) Lipase — No direct role. Lipase breaks down fats; it is not a tool for joining or cutting DNA.
Option (4) Vectors — Direct role. Carry DNA into the host.
NCERT Extract:
Tools of Recombinant DNA Technology – “… Now we know from the foregoing discussion that genetic engineering or recombinant DNA technology can be accomplished only if we have the key tools, i.e., restriction enzymes, polymerase enzymes, ligases, vectors and the host organism. Let us try to understand some of these in detail.”
Chemicals, Enzymes and other Bioactive Molecules – “… Lipases are used in detergent formulations and are helpful in removing oily stains from the laundry.”