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Which of the following bases is found in RNA but not in DNA?

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Question: Which of the following bases is found in RNA but not in DNA?

Options:

  1. Thymine
  2. Uracil
  3. Cytosine
  4. Adenine

Correct Answer: Uracil

Solution: 

RNA contains uracil instead of thymine, which is found in DNA.

Which of the following bases is found in RNA but not in DNA?

Practice Questions

Q1
Which of the following bases is found in RNA but not in DNA?
  1. Thymine
  2. Uracil
  3. Cytosine
  4. Adenine

Questions & Step-by-Step Solutions

Which of the following bases is found in RNA but not in DNA?
Correct Answer: Uracil
  • Step 1: Understand that both RNA and DNA are types of nucleic acids.
  • Step 2: Learn that nucleic acids are made up of building blocks called nucleotides.
  • Step 3: Know that each nucleotide contains a sugar, a phosphate group, and a nitrogenous base.
  • Step 4: Identify the nitrogenous bases: DNA has adenine (A), thymine (T), cytosine (C), and guanine (G).
  • Step 5: Identify the nitrogenous bases in RNA: RNA has adenine (A), uracil (U), cytosine (C), and guanine (G).
  • Step 6: Compare the bases: Notice that RNA has uracil (U) instead of thymine (T), which is found in DNA.
  • Step 7: Conclude that uracil is the base found in RNA but not in DNA.
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