The term DNA is an acronym – whose meaning is acronym pronounced as a Word and ending by the use by lexicalizar are – taken from the English Deoxyribonucleid Acid and who has been as a tracing – adoption of a foreign word translation – the Spanish: deoxyribonucleic acid.
Their formants are:
The word acid that it has its origin in the latin acidus, acid, acidum whose meaning is acid, annoying, biting, whereas at the same time of acer, acris, pungent meaning sharp, pavements, penetrating, energetic agrio whose root comes from the Indo-European * ak-1 (acute).
The forming desoxirribo which is a carbohydrate. It is composed of the prefix des – which means deprivation, more oxy – designating oxygen (taken from the Greek neologism) and the radical chemical rib-/ ribo – used to refer to the glucose with 5 carbon atoms. This suffix is an arbitrary distribution of “arabin” name of radical of arabinose.
And nucleic formed by nucleus, nuclei with the concept of soft part of whole fruit that has hard shell like walnut, more the Greek suffix – ικός (PR. – ikos) which means relative to.
Definition of DNA
The definition of this word is a molecule which has a double chain of nucleotides. These nucleotides in turn, contain phosphoric acid, Deoxyribose and four nitrogenous bases, two pyrimidine: cytosine and thymine and two purine that are guanine and adenine. The two strands of DNA are arranged in an antiparallel fashion and are kept together through hydrogen which forms bridges between complementary nitrogen bases.
This molecule is function to store genetic information that is any body needs absolutely to any vital function.
The DNA you can find shaped nuclear which is who keeps information inside eukaryotic cells, precisely at its core; and in the form of mitochondria and chloroplasts.
Usage examples and phrases
“Through an investigation of the population it has come to the conclusion that only some parts of the DNA strand are altered through generations, by mutations that become the genetic markers”. Here, applies to a study of the chain and its mutations
“The scientist says that the reduplicación of DNA is very precise since there are various correction mechanisms which ensure that every nucleotide in a wrong position is eliminated.” Refers in this case to the reduplicación of this acid.
“Came to the room of the people the vaccines that are produced by DNA technology recombinant”. In this example, used with the sense of a technology used from this string.
Structure of DNA
It is constituted by two chains or also called bands made up of chemical compounds referred to them with the name of nucleotides. These chains form what is known as the double helix (a kind of twisted ladder). At the same time, as explained above each nucleotide is made up of three units: a sugar molecule, Deoxyribose; a phosphate group, and one of four bases: adenine (A), guanine (G), thymine (T) and cytosine (C).
In the center of the nucleotide is the Deoxyribose moiety, surrounded on one side of a phosphate group and on the other a base. Phosphate is attached to Deoxyribose of nucleotide chain attached. The Deoxyribose-phosphate linked form what might be called the sides of the ladder. The bases are couples facing inward, thus forming what would be the steps.
Each of the strings of DNA nucleotides have a special partnership with the other network correspondents. Thus by chemical affinity of the bases, nucleotides which have adenine are coupled with the thymine and guanine of cytosine with those who have. Other complementary bases are joined by hydrogen bonds, which is a weak chemical bond.
The description of the DNA was published for the first time in 1953 by James Watson of the USA and by Francis Crick of Britain. For this reason received both the Nobel Prize for medicine in 1962.