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汉语拼音：hé suān

高分子化合物的一类。由许多个核苷酸连接而成，存在于病毒、细菌以及高等动植物细胞中。分核糖核酸（RNA）和脱氧核糖核酸（DNA）。是生命的最基本物质之一，对生物的生长、遗传、变异等起着重要作用。

核酸是一类生物聚合物，是所有已知生命形式必不可少的组成物质。

核酸是脱氧核糖核酸（DNA）和核糖核酸（RNA）的总称。

核酸由核苷酸组成，而核苷酸单体由5-碳糖、磷酸基和含氮碱基组成。如果5-碳糖是核糖，则形成的聚合物是RNA；如果5-碳糖是脱氧核糖，则形成的聚合物是DNA。

• Proteins and DNA are polymers.

  蛋白质和脱氧核糖核酸都是聚合体.

• DNA is the genetic material inside every cell that carries the blueprints for everything from hair color to the risk of cancer.

  脱氧核糖核酸是存在于每个细胞内的基因物质，它承载从头发颜色到致癌风险等各种遗传型板。

• Ribose and deoxyribose are constituents of the nucleic acids RNA and DNA.

  核糖与脱氧核糖分别是核糖核酸与脱氧核酸(DNA)的结构成分.

• The capsid together with the enclosed nucleic acid is the nucleocapsid.

  衣壳同包围它的核酸一起称为核衣壳.

• He recruited another nucleic acid chemist, a young Pakistani, Dr. Rao Sastri.

  他又找来一名核酸化学家, 叫作拉奥·萨斯特利的年轻的巴基斯坦人.

• All organisms have nucleic acids present in their cells.

  所有生物的细胞中都有核酸.

• Interspecific hybridization of nucleic acids is a method of this type currently being developed.

  核酸的种间杂交便是当前正在发展的这样一种方法.

• It is known that they are strands of deoxyribonucleic acid ( DNA ) , the hereditary material of the cell.

  已知它们为 脱氧核糖核酸 链, 是细胞的遗传物质.

• They use X - ray diffraction to determine the structures of proteins and nucleic acids.

  他们应用X - 射线衍射确定蛋白质和核酸的结构.

• The release of infectious nucler acid from the viral coat is called uncoating.

  病毒的感染性核酸从外壳中脱出,叫做脱壳.

• It has linear double strand DNA, icosahedral - capsid and envelope.

  其核酸结构为线状双股DNA, 衣壳为二十面体对称,有囊膜.

• The application progress on mass spectrometric analysis of nucleotide has been reviewed.

  综述生物质谱用于分析核糖核酸的应用进展.

• Results Seoul like virus RNA were detected from 11 of 14 patients.

  结果　14例肾综合征出血热患者中,11例患者的血清用RTPCR 检出家鼠型汉坦病毒核酸.

• To study the gastrointestinal absorption of microzyme nucleic acid extracts in rats.

  探讨大鼠对酵母菌核酸提取物的可吸收性.

• At warmer temperatures, nucleic acids unravel and cell membranes quickly dissolve.

  在更高温度下, 核酸会散开,细胞膜也会迅速溶解.