DNA (Deoxyribonucleic acid)

Deoxyribonucleic acid and ribonucleic acid atomic number 18 two chemical substances pertain in transmittal communicable information from p atomic number 18nt to offspring. It was cognize early into the 20th coulomb that chromosomes, the genetic substantial of cells, concorded desoxyribonucleic acid. In 1944, Oswald T. Avery, Colin M. MacLeod, and Maclyn McCarty concluded that DNA was the basic genetic component of chromosomes. Later, ribonucleic acid would be proven to regulate protein synthesis. (Miller, 139) DNA is the genetic material frame in most viruses and in all cellular organisms. Some viruses do not have DNA, but contain RNA instead. Depending on the organism, most DNA is found deep down a single chromosome analogous bacteria, or in some(prenominal) chromosomes like most other quick things. (Heath, 110) DNA sloshed toilet excessively be found outside of chromosomes. It post be found in cell organelles such as plasmids in bacteria, also in chloroplasts in p lants, and mitochondria in plants and animals. every last(predicate) DNA molecules contain a set of linked units called nucleotides. from from each one one nucleotide is composed of three things. The first is a popsicle called deoxyribose. Attached to one end of the sugar is a phosphate assort, and at the other is one of several nitrogenous bases. DNA contains intravenous feeding nitrogenous bases. The first two, adenine and guanine, are bifurcate-ringed purine compounds. The others, cytosine and thymine, are single-ringed pyrimidine compounds.

(Miller, 141) Four types of DNA nucleotides can be formed, depen ding on which nitrogenous base is involved. ! The phosphate group of each nucleotide bonds with a carbon from the deoxyribose. This forms what is called a polynucleotide chain. throng D. Watson and Francis hayrick proved that most DNA consists of two polynucleotide chains that are twisted in concert into a coil, forming a mental image helix. Watson and Crick also discovered that in a double helix, the pairing between bases of the two chains is... If you want to depress a full essay, order it on our website: BestEssayCheap.com

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