File Name: physical and chemical properties of dna .zip
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Rice mtDNA appeared in the electron microscope as a collection of linear molecules with heterogeneous length in the range of 1— kb. The major distribution area was 60— kb. Some molecules had the appearance of being supercoiled.
Mayor, S. Drake, L. This satellite virus DNA does not appear to differ in its physical, chemical and biological properties from DNA isolated directly from virions or from cells coinfected with adenovirus. The DNA is double-stranded with a buoyant density of 1. It sediments at 16S in both neutral and alkaline sucrose gradients. Single-stranded DNA from alkaline sucrose gradients has a modal length of 1.
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Sign In or Create an Account. Sign In. Advanced Search. Search Menu. Skip Nav Destination Article Navigation. Close mobile search navigation Article Navigation. Volume 1. Article Contents Abstract. Article Navigation. Chemical and physical properties of adeno-associated satellite virus DNA produced during coinfection with herpes simplex virus H. Mayor , H. Oxford Academic. Google Scholar. Cite Cite H. Select Format Select format. Permissions Icon Permissions.
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It is sometimes called the "molecule of heredity," because parents transmit copied portions of their own DNA to offspring during reproduction, and because they propagate their traits by doing so. In bacteria and other simple or prokaryotic cell organisms, DNA is distributed more or less throughout the cell. In the complex or eukaryotic cells that make up plants, animals and in other multi-celled organisms, most of the DNA resides in the cell nucleus. The energy-generating organelles known as chloroplasts and mitochondria also carry DNA, as do many viruses. Although sometimes called "the molecule of heredity," pieces of DNA as people typically think of them are not single molecules. Each vine-like molecule is a strand of DNA: a chemically linked chain of nucleotides, each of which consists of a sugar, a phosphate and one of four kinds of aromatic "bases".
Dawn B. Marks, Verne N. Schumaker; Some physical and chemical properties of trypsin-digested nucleoprotein. Biochem J 1 October ; 4 : — A series of trypsin-digested nucleoprotein preparations differing only in molecular weight were prepared by blending. The intrinsic viscosity and average sedimentation coefficient were determined for each of these preparations.
Nucleic acid , naturally occurring chemical compound that is capable of being broken down to yield phosphoric acid , sugars, and a mixture of organic bases purines and pyrimidines. Nucleic acids are the main information-carrying molecules of the cell , and, by directing the process of protein synthesis , they determine the inherited characteristics of every living thing. DNA is the master blueprint for life and constitutes the genetic material in all free-living organisms and most viruses. RNA is the genetic material of certain viruses, but it is also found in all living cells, where it plays an important role in certain processes such as the making of proteins.
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. The nucleotides are joined to one another in a chain by covalent bonds known as the phospho-diester linkage between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules A with T and C with G , with hydrogen bonds to make double-stranded DNA. The complementary nitrogenous bases are divided into two groups, pyrimidines and purines.
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. The nucleotides are joined to one another in a chain by covalent bonds known as the phospho-diester linkage between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone.
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Mechanical Properties of DNA. DNA is a biological polymer that has many unique physical and chemical proper-. ties and serves a critical and.
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