Multiple choice

5-Bromouracil is a base analog of which nitrogenous base?

  1. Uracil

  2. Thymine

  3. Guanine

  4. Adenine

  5. Cytosine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A base analog is a chemical that can substitute for a normal nucleobase in nucleic acids. A common example would be 5-bromouracil (5BU), the abnormal base found in the mutagenic nucleotide analog BrdU. When a nucleotide containing 5-bromouracil is incorporated into the DNA and it is most likely to pair with adenine. It is because 5BU is a base analog of thymine it base pair with cytosine as thymine does.

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