Questions: Which of the following nucleotides is only found in RNA? Uracil Adenine Thymine Guanine

Which of the following nucleotides is only found in RNA? Uracil Adenine Thymine Guanine
Transcript text: Which of the following nucleotides is only found in RNA? Uracil Adenine Thymine Guanine
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Solution

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The answer is the first one: Uracil.

Explanation for each option:

  • Uracil: This nucleotide is only found in RNA. In RNA, uracil pairs with adenine, replacing thymine, which is found in DNA.

  • Adenine: This nucleotide is found in both DNA and RNA. It pairs with thymine in DNA and with uracil in RNA.

  • Thymine: This nucleotide is found only in DNA, not in RNA. In DNA, thymine pairs with adenine.

  • Guanine: This nucleotide is found in both DNA and RNA. It pairs with cytosine in both types of nucleic acids.

In summary, uracil is the nucleotide that is unique to RNA.

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