Specific radioactive identification of ribosomal RNA can be achieved by using $C^{14}$ labelled

Guanine

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Uracil

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Thymine

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Cytocine

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Solution

The correct option is C Uracil
Uracil replaces the thymine in the RNA sequence. Whenever there is analysis related to RNA synthesis or mRNA production or activity, or any other experiment related to RNA, there is the use of radioactively labelled $C^{14}$ in uracil. This radiolabelled uracil gets incorporated in the RNA sequence and helps in the study related to RNA.
Thus, the correct answer is option B.

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