noun ダウンロード 🔗共有 グアニン A substance first obtained from guano; it is a nucleic base and pairs with cytosine in DNA and RNA (by means of three hydrogen bonds). Examples : "The scientist studied the guanine content in the DNA samples from the ancient fossils. " 科学者は古代の化石から採取したDNAサンプル中のグアニン含有量を研究した。 biochemistry biology chemistry substance compound AIとチャット語彙ゲーム読解練習