Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R).
Assertion (A):¹⁵N is a radioactive isotope of nitrogen, and it cannot be separated from ¹⁴N only based on density.
Reason(R): Taylor and colleagues performed experiments on Vicia faba to prove that DNA in chromosomes replicates semi-conservatively.
In the light of the above statement, choose the most appropriate answer.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

(A) is not correct, (R) is correct

(A) is correct, (R) is not correct

Both (A) and (R) are true but (R) is not the correct explanation of (A).

answer is C.

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Detailed Solution

Separation of radioisotopes based on density can be achieved through a process called centrifugation. Radioisotopes get separated based on density. The heavy DNA molecule can be distinguished from normal DNA by centrifugation in a cesium chloride (CsCl) density gradient.

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