
1) Pairs with guanine 2) Pyrimidine
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https://www.crosswordclues.com/clue/cytosine

Cytosine n (C) is one of the four main bases found in DNA and RNA, along with adenine, guanine, and thymine (uracil in RNA). It is a pyrimidine derivative, with a heterocyclic aromatic ring and two substituents attached (an amine group at position 4 and a keto group at position 2). The nucleoside of cytosine is cytidine. In Watson-Crick base pairi...
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http://en.wikipedia.org/wiki/Cytosine

a nitrogenous base derived from pyrimidine that occurs in nucleic acids, the heredity-controlling components of all living cells, and in some ... [4 related articles]
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http://www.britannica.com/eb/a-z/c/176

A chemical compound that is used to make one of the building blocks of DNA and RNA. It is a type of pyrimidine.
Found on
http://www.cancer.gov/dictionary?expand=C

C4H5N3O Molar mass: 111.102
Found on
http://www.convertunits.com/molarmass/Cytosine

A pyrimidine that is one of five organic bases found in the nucleic acids of cells. In both DNA and RNA, it pairs with guanine. Controversy surrounds its prebiotic origin, together with that of uracil. In 1999, Robert Shapiro pointed out that:
1 No reactions have been describ...
Found on
http://www.daviddarling.info/encyclopedia/C/cytosine.html

<biochemistry> Pyrimidine base found in DNA and RNA. Pairs with guanine. Glycosylated base is cytidine. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

(si´to-sēn) a pyrimidine base found in nucleic acids. cytosine arabinoside cytarabine.
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http://www.encyclo.co.uk/local/21001

Pyrimidine base found in DNA and RNA. Pairs with guanine. Glycosylated base is cytidine.
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http://www.encyclo.co.uk/visitor-contributions.php
(Cyt) Type: Term Pronunciation: sī′tō-sēn Definitions: 1. A pyrimidine found in nucleic acids.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=22728

[
n] - a base found in DNA and RNA and derived from pyrimidine
Found on
http://www.webdictionary.co.uk/definition.php?query=cytosine

pyrimidine nitrogenous base found in nucleotides
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https://courses.lumenlearning.com/microbiology/chapter/glossary/

One of the four nucleotide bases in DNA or RNA; pairs with guanine.
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https://isogg.org/wiki/Genetics_Glossary
noun a base found in DNA and RNA and derived from pyrimidine; pairs with guanine
Found on
https://www.encyclo.co.uk/local/20974

a pyrimidine base, CHNO, that is one of the fundamental components of DNA and RNA, in which it forms a base pair with guanine. Symbol: C Cf. cytidine, cytidine monophosphate.
Found on
https://www.infoplease.com/dictionary/cytosine
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