THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Adenine
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Cytosine
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Thymine
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Detailed explanation-1: -Uracil is present only in RNA, whereas thymine is present only in DNA. Thus, thymine is the nitrogenous base which is not present in RNA.
Detailed explanation-2: -Uracil is one of these bases. However, since mRNA is relatively short-lived and any potential faults don’t result in any lasting damage, RNA employs uracil because the instability doesn’t matter as much for RNA. Thymine is also quickly oxidized. The thymine in the nucleus is shielded from oxygen.
Detailed explanation-3: -⇒ Thymine is present in DNA but not in RNA.
Detailed explanation-4: -So the correct answer is ‘Uracil’.
Detailed explanation-5: -Answer and Explanation: The correct answer is option (e) The structure of bacterial RNA is composed of an upstream leader sequence, Ribosome binding site, Translation start codon, coding genes trans, translation stop codon, and downstream trailing sequence. An mRNA molecule does not contain a Promoter sequence.