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uracil

uracil

1 8.8
One of the four bases in RNA that pairs with adenine and replaces thymine
  • noun
  • /ˈjʊərəsɪl/
  • Specialized
: uracilo
  • Most atheists don't have access to machines that allow them to look backward 3.5 billion years ago to see whether God pushed that last uracil in place.
  • uracil replaces thymine
  • uracil replaces

Examples

  • If they see a uracil that can come from a deamination of the cytosine, so it gets taken out of the DNA, it shouldn't be in DNA.

  • So these are the bases, thymine, cytosine and uracil, OK.

  • I've told you one that there's uracil instead of thymine.

  • In addition to amino acids, the Murchison meteorite also contains adenine, guanine, and uracil, compounds in DNA and RNA that living creatures use to transfer and store their genetic information.

    Academic text (2001)
  • In RNA, uracil pairs with adenine instead of thymine.

  • In RNA, uracil replaces thymine to help form the genetic code.

  • Scientists found that uracil is essential for RNA synthesis.

Surface Forms

uracil singular
uracils plural

Etymology

Uracil uses the prefix ur-, which you can link to familiar words like urine or urea because it is a small nitrogen compound early chemists studied in such samples. So, uracil is the RNA base that 'replaces thymine' and pairs with adenine.