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9.1: The Structure of DNA - Biology LibreTexts
https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Concepts_in_Biology_(OpenStax)/09%3A_Molecular_Biology/9.01%3A_The_Structure_of_DNA
WebMar 17, 2022 · There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine). A DNA molecule is composed of two strands. Each strand is composed of nucleotides bonded together covalently between the phosphate group of one and the deoxyribose sugar of the next.
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9.1 The Structure of DNA - Concepts of Biology | OpenStax
https://openstax.org/books/concepts-biology/pages/9-1-the-structure-of-dna
WebThere are four types of nitrogenous bases in DNA. Adenine (A) and guanine (G) are double-ringed purines, and cytosine (C) and thymine (T) are smaller, single-ringed pyrimidines. The nucleotide is named according to the nitrogenous base it contains.
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Nucleobase - Wikipedia
https://en.wikipedia.org/wiki/Nucleobase
WebChemical structure of DNA, showing four nucleobase pairs produced by eight nucleotides: adenine (A) is joined to thymine (T), and guanine (G) is joined to cytosine (C). + This structure also shows the directionality of each of the two phosphate-deoxyribose backbones, or …
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Nucleic acids (article) | Khan Academy
https://www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/dna-and-rna-structure/a/nucleic-acids
WebEach nucleotide in DNA contains one of four possible nitrogenous bases: adenine (A), guanine (G) cytosine (C), and thymine (T). Adenine and guanine are purines, meaning that their structures contain two fused carbon-nitrogen rings. Cytosine and thymine, in contrast, are pyrimidines and have a single carbon-nitrogen ring.
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DNA structure and replication review (article) | Khan Academy
https://www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/replication/a/hs-dna-structure-and-replication-review
WebDNA uses four kinds of nitrogenous bases: adenine (A), guanine (G) cytosine (C), and thymine (T). RNA nucleotides may also contain adenine, guanine and cytosine bases, but instead of thymine they have another base called uracil (U). Chargaff's rules.
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DNA | Definition, Discovery, Function, Bases, Facts, & Structure
https://www.britannica.com/science/DNA
Web2 days ago · The nucleotides of DNA consist of a deoxyribose sugar molecule to which is attached a phosphate group and one of four nitrogenous bases: two purines (adenine and guanine) and two pyrimidines (cytosine and thymine).
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DNA function & structure (with diagram) (article) | Khan Academy
https://www.khanacademy.org/test-prep/mcat/biomolecules/dna/a/dna-structure-and-function
WebAll four nucleotides (A, T, G and C) are made by sticking a phosphate group and a nucleobase to a sugar. The sugar in all four nucleotides is called deoxyribose. It’s a cyclical molecule—most of its atoms are arranged in a ring-structure. The ring contains one oxygen and four carbons.
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Nucleotide - Definition, Structure (3 Parts), Examples & Function
https://biologydictionary.net/nucleotide/
WebOct 4, 2019 · A nucleotide is made up of three parts: a phosphate group, a 5-carbon sugar, and a nitrogenous base. The four nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. RNA contains uracil, instead of thymine. A nucleotide within a chain makes up the genetic material of all known living things.
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The Structure and Function of DNA - Molecular Biology of the Cell
https://www.ncbi.nlm.nih.gov/books/NBK26821/
WebDNA is made of four types of nucleotides, which are linked covalently into a polynucleotide chain (a DNA strand) with a sugar-phosphate backbone from which the bases (A, C, G, and T) extend. A DNA molecule is composed of two (more...) The way in which the nucleotide subunits are lined together gives a DNA strand a chemical polarity.
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DNA Is a Structure That Encodes Biological Information
https://www.nature.com/scitable/topicpage/dna-is-a-structure-that-encodes-biological-6493050/
WebThere are four different DNA nucleotides, each defined by a specific nitrogenous base: adenine (often abbreviated "A" in science writing), thymine (abbreviated "T"), guanine (abbreviated "G"),...
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