DNA - Wikipedia
Chemical structure of DNA; hydrogen bonds shown as dotted lines. Each end of the double helix has an exposed 5' phosphate on one strand and an exposed 3′ hydroxyl group (—OH) on the other. DNA is a long polymer made from repeating units called nucleotides.
DNA Structure - Biology Dictionary
2021年1月21日 · DNA (deoxyribonucleic acid) molecules are nucleic acids, which are the information-carrying molecules of the cell. DNA molecules are polymers and are made up of many smaller molecules, called nucleotides. Each nucleotide contains a phosphate group, a sugar molecule, and a nitrogenous base.
DNA | Definition, Discovery, Function, Bases, Facts, & Structure ...
2024年12月15日 · DNA, organic chemical of complex molecular structure found in all prokaryotic and eukaryotic cells. It codes genetic information for the transmission of inherited traits. The structure of DNA was described in 1953, leading to further understanding of DNA replication and hereditary control of cellular activities.
The Structure and Function of DNA - Molecular Biology of the …
In this section we examine the structure of the DNA molecule and explain in general terms how it is able to store hereditary information. A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits. Each of …
DNA: Properties, Structure, Composition, Types, Functions
2023年8月3日 · Deoxyribonucleic acid (DNA) is the heredity material found in humans and all living organisms. It is a double-stranded molecule and has a unique twisted helical structure.
What Is DNA?- Meaning, DNA Types, Structure and Functions
DNA is known as Deoxyribonucleic Acid. It is an organic compound that has a unique molecular structure. It is found in all prokaryotic cells and eukaryotic cells. There are three different DNA types: A-DNA: It is a right-handed double helix similar to the B-DNA form.
Biochemistry, DNA Structure - StatPearls - NCBI Bookshelf
2023年6月12日 · The remarkable structure of deoxyribonucleic acid (DNA), from the nucleotide up to the chromosome, plays a crucial role in its biological function. The ability of DNA to function as the material through which genetic information is stored and transmitted is a direct result of its elegant structure.
9.1: The Structure of DNA - Biology LibreTexts
2022年3月17日 · The DNA molecule is a polymer of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. There are four nitrogenous bases in DNA, two …
Deoxyribonucleic Acid (DNA) Fact Sheet - National Human …
2020年8月24日 · DNA is made of chemical building blocks called nucleotides. These building blocks are made of three parts: a phosphate group, a sugar group and one of four types of nitrogen bases. To form a strand of DNA, nucleotides are linked into chains, with the phosphate and sugar groups alternating.
The Chemical Structure of DNA - BioInteractive
2010年2月5日 · This animation explores the chemical components and bonds of the nucleotides that make up DNA. As shown in the animation, DNA is a polymer of units called nucleotides, which contain deoxyribose sugars and nitrogenous bases.