Nucleic Acids :: essays research papers

desoxyribonucleic acid is the single most important particle found within cells. It is a stable polynucleotide, which chairs coded information for inherited characteristics. It is contained in chromosomes in the nucleus of an eukaryot cell. The inseparable features of the Watson-Crick model ar summarised below.1. The devil spiraling polynucleotide chains ar gyrate around a common axis. The 2 chains have antonym polarity i.e. they atomic number 18 antiparrallel.2. The regular repeat abrasion phosphate rachis of to each one strand lies on the extracurricular of the helix. The purine and pyrimidine origins project inwards at 900 to the axis of the helix.3.The deuce strands are held in concert by henry stick to between pairs of bases such that guanine of all time pairs with cytosine and axerophthol of all time pairs with liothyronine this is called complementary base sexual union3. The diameter of the helix is 2.0 nm and adjacent bases are separated by 0.34 nm and in clined at 360 relative to each other. This means that each complete turn of the stunt woman helix contains about 10 base pairs.4. The amount of guanine is normally equal to that of cytosine.The monomers of RNA and DNA are called nucleotides. Each nucleotide has ternion partsA Five degree Celsius or Pentose SugarThe sugar will be one of two very similar pentose rings. Ribonucleic acids contain the sugar ribose. Deoxyribonucleic acids contain the sugar deoxyribose. The solitary(prenominal) difference between these two sugars is that deoxyribose contains one oxygen atom little than ribose. Pentose sugars are essential because they are involved in linking different nucleotides together by condensation reactions.The Nitrogen-Containing Basesthither are two types of bases found in nucleic acids. The purine bases have two due north containing rings, while the pyrimidines have only one. In DNA the purines are adenine (A) and guanine (G) and the pyrimidines are cytosine (C) and thymin e (T). In RNA the purine bases are the same as in DNA, provided the pyrimidines are cytosine and atomic number 92 (U). These rings have the chemical plaza of being bases because of the nitrogen atoms they contain. angstrom always forms 2 hydrogen bonds with thymine. ascorbic acid always forms 3 hydrogen bonds with guanine.Nucleic Acids essays research papers DNA is the single most important molecule found within cells. It is a stable polynucleotide, which contains coded information for inherited characteristics. It is contained in chromosomes in the nucleus of an eukaryot cell. The essential features of the Watson-Crick model are summarised below.1. The two helical polynucleotide chains are coiled around a common axis. The two chains have opposite polarity i.e. they are antiparrallel.2. The regular repeating sugar phosphate backbone of each strand lies on the outside of the helix. The purine and pyrimidine bases project inwards at 900 to the axis of the helix.3.The two strands are held together by hydrogen bonding between pairs of bases such that guanine always pairs with cytosine and adenine always pairs with thymine this is called complementary base pairing3. The diameter of the helix is 2.0 nm and adjacent bases are separated by 0.34 nm and inclined at 360 relative to each other. This means that each complete turn of the double helix contains about 10 base pairs.4. The amount of guanine is usually equal to that of cytosine.The monomers of RNA and DNA are called nucleotides. Each nucleotide has three partsA Five Carbon or Pentose SugarThe sugar will be one of two very similar pentose rings. Ribonucleic acids contain the sugar ribose. Deoxyribonucleic acids contain the sugar deoxyribose. The only difference between these two sugars is that deoxyribose contains one oxygen atom less than ribose. Pentose sugars are essential because they are involved in linking different nucleotides together by condensation reactions.The Nitrogen-Containing BasesThere are t wo types of bases found in nucleic acids. The purine bases have two nitrogen containing rings, while the pyrimidines have only one. In DNA the purines are adenine (A) and guanine (G) and the pyrimidines are cytosine (C) and thymine (T). In RNA the purine bases are the same as in DNA, but the pyrimidines are cytosine and uracil (U). These rings have the chemical property of being bases because of the nitrogen atoms they contain.Adenine always forms 2 hydrogen bonds with thymine.Cytosine always forms 3 hydrogen bonds with guanine.