(A) separation of DNA fragments on agarose gel

(C) making the DNA bands visible under UV radiation

(D) isolating alien DNA from the choice organism.

KCET · BIOLOGY · STD 12 - 9. Biotechnology: Principles and Processes

Elution means

A separation of DNA fragments on agarose gel
B cutting and extraction of DNA bands from the agarose gel
C making the DNA bands visible under UV radiation
D isolating alien DNA from the choice organism.

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Answer & Solution

Correct Answer

(B) cutting and extraction of DNA bands from the agarose gel

Step-by-step Solution

Detailed explanation

(B) cutting and extraction of DNA bands from the agarose gel,
After the DNA fragments have separated, the bands are cut and extracted, and the process is called elution.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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