ppt模板音樂五線譜主題-wenkub
2022-08-29 16:10:32 本頁面
【正文】 ecule, but instead as a pair of molecules that are held tightly together.[5][8] These two long strands entwine like vines, in the shape of a double helix. The nucleotide repeats contain both the segment of the backbone of the molecule, which holds the chain together, and a nucleobase, which interacts with the other DNA strand in the helix. A nucleobase linked to a sugar is called a nucleoside and a base linked to a sugar and one or more phosphate groups is called a nucleotide. Polymers prising multiple linked nucleotides (as in DNA) are called a polynucleotide.[9] 樣例文本 C ? In living anisms DNA does not usually exist as a single molecule, but instead as a pair of molecules that are held tightly together.[5][8] These two long strands entwine like v
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