The difference between Cytosine and Nucleobase
When used as nouns, cytosine means a heterocyclic base, 4-aminopyrimidin-2(1h)-one, which pairs with guanine in dna and rna (by means of three hydrogen bonds), whereas nucleobase means the base of a nucleic acid, such as thymine, uracil, adenine, cytosine and guanine.
check bellow for the other definitions of Cytosine and Nucleobase
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Cytosine as a noun (biochemistry):
A heterocyclic base, 4-aminopyrimidin-2(1H)-one, which pairs with guanine in DNA and RNA (by means of three hydrogen bonds).
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Nucleobase as a noun (biochemistry):
The base of a nucleic acid, such as thymine, uracil, adenine, cytosine and guanine.