dna
Deoxyribonucleic acid and ribonucleic acid are two chemical substances involved in transmitting geneticinformation from parent to offspring. It was known early into the 20th century that chromosomes, the material of cells, contained DNA. In 1944, Oswald T. Avery, Colin M. MacLeod, and Maclyn McCarty concluded that DNA was the basic genetic component of chromosomes. Later, RNA would be proven to regulate protein synthesis. (Miller, 139) DNA is the genetic material found 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 within a single chromosome like bacteria, or in several chromosomes like most other living things. (Heath, 110) DNA can also be outside of chromosomes. It can be found in cell organelles such as plasmids in bacteria, also in plants, and mitochondria in plants and animals. All DNA molecules contain a set of linked units called nucleotides. Each nucleotide is composed of three things. The first is a sugar called deoxyribose. Attached to one end of the sugar is a phosphate group, the other is one of several nitrogenous bases. DNA contains four nitrogenous bases. The first two,
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Some common words found in the essay are:
Grolier Encyclopedia, DNA RNA, Methods Materials, Maclyn McCarty, Watson Crick, DNA Deoxyribonucleic, DNAs RNA, Francis Crick, protein synthesis, Company Publishers, nitrogenous bases, dna rna, amino acids, double helix, hydrogen bonds, mrna molecule, sugar phosphate, genetic material, bases dna, Foresman Company, grolier encyclopedia 1992, single-ringed pyrimidine compounds, double-ringed purine compounds, strands double helix, wm brown company,
Approximate Word count = 1313
Approximate Pages = 5 (250 words per page double spaced)
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