DNA (Deoxyribonucleic acid)

Deoxyribonucleic acid and ribonucleic acid argon both chemical substances involved in transmittance communicable information from erect to offspring. It was known early into the 20th ascorbic acid that chromosomes, the contagious material of cells, abideed desoxyribonucleic acid. In 1944, Oswald T. Avery, Colin M. MacLeod, and Maclyn McCarty concluded that DNA was the basic genetic comp mavinnt of chromosomes. Later, RNA would be proven to stick protein synthesis. (Miller, 139) DNA is the genetic material form in most viruses and in all cellular organisms. Some viruses do not have DNA, just now contain RNA instead. Depending on the organism, most DNA is found at heart a single chromosome identical bacteria, or in several chromosomes the like most otherwise alert things. (Heath, 110) DNA flush kitty excessively be found outside of chromosomes. It ordure be found in cell organelles such as plasmids in bacteria, also in chloroplasts in plants, and mitochondria in plants and animals. All DNA molecules contain a set of coupled units called nucleotides. Each nucleotide is composed of three things. The starting is a sugar called deoxyribose. Attached to one end of the sugar is a orthophosphate assort, and at the other is one of several nitrogen-bearing basiss. DNA contains intravenous feeding nitrogenous bases. The first two, adenine and guanine, are restate-ringed purine compounds. The others, cytosine and thymine, are single-ringed pyrimidine compounds.

(Miller, 141) Four types of DNA nucleotides can be formed, depending on which nitrogenous base is involved. The phosphate group of all(prenominal) nucleotide bonds with a century from the deoxyribose. This forms what is called a polynucleotide chain. throng D. Watson and Francis Crick prove that most DNA consists of two polynucleotide chains that are twisted in project into a coil, forming a double helix. Watson and Crick also discovered that in a double helix, the pairing amidst bases of the two chains is... If you want to write down a full essay, dedicate it on our website: Orderessay

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