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Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids. … See more
DNA is a long polymer made from repeating units called nucleotides. The structure of DNA is dynamic along its length, being capable of coiling into tight loops and other … See more
DNA usually occurs as linear chromosomes in eukaryotes, and circular chromosomes in prokaryotes. The set of chromosomes in a cell makes up its genome; the human genome has approximately 3 billion base pairs of DNA arranged into 46 … See more
A DNA helix usually does not interact with other segments of DNA, and in human cells, the different chromosomes even occupy separate … See more
Genetic engineering
Methods have been developed to purify DNA from organisms, such as phenol-chloroform extraction, … See moreBase modifications and DNA packaging
The expression of genes is influenced by how the DNA is packaged in chromosomes, in a … See moreAll the functions of DNA depend on interactions with proteins. These protein interactions can be non-specific, or the protein can bind specifically to a single DNA sequence. Enzymes can also bind to DNA and of these, the polymerases that copy the DNA base … See more
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Powered by MSNWhat is DNA? - MedlinePlus
- DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organis…
The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases d… - DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Eac…
An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in th…
- DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organis…
Introduction: What is DNA? | Learn Science at Scitable - Nature
Deoxyribonucleic acid, more commonly known as DNA, is a complex molecule that contains all of the information necessary to build and maintain an organism. All living things have DNA within …
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