Nucleic acid | Definition, Function, Structure, & Types | Britannica
2024年9月9日 · All nucleic acids contain the bases A, C, and G; T, however, is found only in DNA, while U is found in RNA. The pentose sugar in DNA (2′-deoxyribose) differs from the sugar in RNA (ribose) by the absence of a hydroxyl group (―OH) on the 2′ carbon of the sugar ring.
DNA - Wikipedia
DNA and ribonucleic acid (RNA) are nucleic acids. Alongside proteins, lipids and complex carbohydrates (polysaccharides), nucleic acids are one of the four major types of macromolecules that are essential for all known forms of life. The two DNA strands are known as polynucleotides as they are composed of simpler monomeric units called nucleotides.
Nucleic acid - Wikipedia
Deoxyribonucleic acid (DNA) is a nucleic acid containing the genetic instructions used in the development and functioning of all known living organisms. The chemical DNA was discovered in 1869, but its role in genetic inheritance was not demonstrated until 1943.
Nucleic Acid - Definition, Function and Examples - Biology …
2021年1月15日 · The most common nucleic acids in nature are DNA and RNA. These molecules form the foundation for the majority of life on Earth, and they store the information necessary to create proteins which in turn complete the functions necessary for cells to survive and reproduce.
核酸 - 维基百科，自由的百科全书
核酸 （英語： nucleic acid）是一种通常位于 细胞 内的大型 生物分子，主要負責生物体 遗传信息 的携带和传递。 核酸有兩大類，分別是 脱氧核糖核酸 （DNA）和 核糖核酸 （RNA）。 核酸的 单体 结构为 核苷酸。 每一个核苷酸分子由三部分组成：一个 五碳糖 、一个 含氮鹼基 和一个或多个 磷酸 基团。 如果其五碳糖是 去氧核糖 則為 去氧核糖核苷酸，此單體之聚合物是 DNA。 如果其五碳糖是 核糖 則為 核糖核苷酸，此單體之聚合物是 RNA。 核酸是最重要的 生物大分子 （其余 …
3.11: Nucleic Acids - DNA and RNA - Biology LibreTexts
2023年10月31日 · The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material found in all living organisms, ranging from single-celled bacteria to multicellular mammals.
8.1: Nucleic Acids - Structure and Function - Biology LibreTexts
2024年6月29日 · The nucleic acids consist of two major macromolecules, Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) that carry the genetic instructions for the development, functioning, growth, and reproduction of all known organisms and viruses. Both consist of polymers of a sugar-phosphate-sugar backbone with organic heterocyclic bases attached to ...
DNA | Definition, Discovery, Function, Bases, Facts, & Structure ...
2024年10月12日 · Deoxyribonucleic acid (DNA) is an organic chemical that contains genetic information and instructions for protein synthesis. It is found in most cells of every organism. DNA is a key part of reproduction in which genetic heredity occurs through the passing down of DNA from parent or parents to offspring.
3.5 Nucleic Acids - Biology 2e - OpenStax
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the DNA is not enclosed in a ...
Discovery of DNA Structure and Function: Watson and Crick
Based upon years of work using hydrolysis to break down and analyze yeast nucleic acids, Levene proposed that nucleic acids were composed of a series of nucleotides, and that each...