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A nucleotide is one of the small building-block units that link together in a long chain to form DNA and RNA, the molecules that carry genetic information in every living cell. Each nucleotide is made of three parts: a sugar, a phosphate group, and a base. This is a science-class word - you'll meet it in biology or chemistry, not everyday talk.
核苷酸（DNA/RNA 的基本組成單位）
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
nucleotidenoun/ˈn(j)u(ː)kliəˌtaɪd/
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biochemistrybiologychemistryThe monomer constituting DNA or RNA biopolymer molecules. Each nucleotide consists of a nitrogenous heterocyclic base (or nucleobase), which can be either a double-ringed purine or a single-ringed pyrimidine; a five-carbon pentose sugar (deoxyribose in DNA or ribose in RNA); and a phosphate group.
- With a genome of only 400 million or so nucleotide bases, the pufferfish, Fugu rubripes rubripes, has the smallest known genome of any vertebrate animal. […] But the region of DNA between the landmarks can be a million or more nucleotides long.
- Magid draws […] a diagram depicting a restriction enzyme cutting neatly through a sequence of nucleotides.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。