DNA Structure - Biology Dictionary
2021年1月21日 · 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 molecules consist of two DNA strands, which are twisted around one another to form a spiral shape known as the double helix.
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: Properties, Structure, Composition, Types, Functions
2023年8月3日 · It is a double-stranded molecule and has a unique twisted helical structure. DNA is made up of nucleotides, each nucleotide has three components: a backbone made up of a sugar (Deoxyribose) and phosphate group and a nitrogen-containing base attached to the sugar.
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 | Definition, Discovery, Function, Bases, Facts, & Structure ...
2024年11月21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.
What makes up the Chemical Structure of DNA? - Compound …
2015年3月24日 · These strands are made up of nucleotides, which themselves consist of three component parts: a sugar group, a phosphate group, and a base. The sugar and phosphate groups combined form the repeating ‘backbone’ of the DNA strands.
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. The nucleotides are linked in a directional manner via phosphodiester bonds between their sugars.
DNA: molecular structure - atlasgeneticsoncology.org
- DNA is a polymere, made of units called nucleotides (or mononucleotides). Using the protein nomenclature, we could speak in terms of primary, secondary, tertiary and quaternary structures of the molecule: A nucleoside is made of a sugar + a nitrogenous base. A nucleotide is made of a phosphate + a sugar + a nitrogenous base.
DNA Structure and Shape - Ask A Biologist
2010年4月24日 · A closer look at the chemical structure of DNA shows four main building blocks. We call these nitrogenous bases: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C). DNA also includes sugars and phosphate groups (made of phosphorus and oxygen).
Nucleic acid - Wikipedia
Nucleic acids RNA (left) and DNA (right).. Nucleic acids are large biomolecules that are crucial in all cells and viruses. [1] They are composed of nucleotides, which are the monomer components: a 5-carbon sugar, a phosphate group and a nitrogenous base.The two main classes of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). If the sugar is ribose, the polymer is RNA ...