NOTE: Free essay sample provided on this page should be used for references or sample purposes only. The sample essay is available to anyone, so any direct quoting without mentioning the source will be considered plagiarism by schools, colleges and universities that use plagiarism detection software. To get a completely brand-new, plagiarism-free essay, please use our essay writing service.
One click instant price quote
DNA Structure DNA is a double stranded molecule twisted into a helix. Each spiraling strand is comprised of a sugar phosphate backbone and attached bases connected to a complimentary strand. The complimentary strand is connected by non-covalent hydrogen bonding between paired bases. The bases are adenine, thymine, cosine, and gaining.
The fundamental building block of DNA is the nucleotide. The nucleotide has three parts. A nitrogen-containing pyrimidine or purine base, a deoxyribose sugar, and a phosphate group that acts as a bridge between the deoxyribose sugars that are adjacent to it. Each deoxyribose sugar contains five carbon atoms joined to an oxygen atom. The carbon atoms are sequentially numbered from 1 - 5.
Each is considered a prime and is labeled such as this: 1. The first carbon atom is the carbon atom covalently attached to one of the four bases. Guanine and adenosine are purines and cytosine and thymine are pyrimidines. The phosphate groups are attached to the (3) third and (5) fifth carbon atoms. When speaking of DNA the term nucleotide refers to the complete assembly of a nitrogenous base, a five carbon deoxyribose sugar, and a phosphate group. A DNA molecule is composed of two unbranched polynucleotide chains that wind about each other into a structure called a double helix.
Each revolution is 34 A, there are ten base pairs in each revolution. The structure of DNA is an advantage because of its simplicity. This structure lessens the chance of mutation during replication. Robert D. Stewart, Ph. D.
A Few Words About DNA and Chromatin Dosimetry research and Technology (DRT) Group K 3 - 55 Pacific Northwest National Laboratory (PNNL)
Free research essays on topics related to: carbon, dna, carbon atoms, phosphate, bases
Research essay sample on Deoxyribose Sugar And A Phosphate Sugar And A Phosphate Group Dna
