Multiple choice

Which one of the following components of a gene is least likely to be conserved in evolution?

  1. Promoter

  2. Exons

  3. Introns

  4. Transposons

  5. The poly-A tail

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Introns are DNA bases, which are found between exons, but are not transcribed. The DNA sequence of the intron does not encode protein and is not highly conserved.