How many letters does the top answer for “a base found in dna and rna and derived from pyrimidine; pairs with guanine” have?

The most common answer is cytosine (8 letters).

Crossword clue: a base found in dna and rna and derived from pyrimidine; pairs with guanine

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

cytosine 8 letters wn-def

a base found in DNA and RNA and derived from pyrimidine; pairs with guanine