Deoxyribonucleic acid

Deoxyribonucleic acid (DNA, for the acronym in English Deoxyribonucleic acid), also known as DNA, chromosome is the main chemical constituents, but also of genetic material. Sometimes referred to as "genetic particles," because during the breeding process, the father of the generation part of their own DNA copy delivered to offspring, thus completing the spread of characters. a. DNA is a nucleic acid from the monomer polymerization from the polymer. b. DNA from each composed of three parts: part of the five members of nitrogenous base + carbon sugar (deoxyribose) + member of phosphate. c. The nitrogen-containing nucleic acid bases can be divided into four categories: guanine (G), thymine (T), adenine (A), cytosine (C) d. DNA base pairs of four nitrogen-containing components of species-specific. That is, the ratio of four nitrogen-containing bases in the same species, different individuals is the same, but again there are different species differences. e. DNA base pairs of four nitrogen ratio is peculiar laws, and every kind of DNA in the organism A ≈ TC ≈ G Jia Kafu law. Discovery of DNA Michel called nucleic acid is a young Swiss chemist discovered, it's still 1869, to 1909, a U.S. biochemist also found that DNA in the two ribose molecule carbohydrates, nucleic acids also have two , Called a deoxyribose acid, is the English abbreviation for DNA, the other is RNA, the initials are RNA. DNA in the nuclei in general only, and RNA in the nucleus in addition to Chinese and foreign, also located in the cytoplasm. Xijunxuejia Avery pneumococcal transformation through research, the accidental discovery of the DNA, is that many people were looking for a long time the genetic material. In the DNA, the genetic secrets of life with the genetic material, so, in the end decide what is to explore the phenomenon of genetic life, and finally to the open secret of the time, at this time is the 1940s. Untie the secret DNA When the gene is found DNA, people still like to know how this DNA is a kind of things, it is also what specific approach to the lives of so many information to the new successor does » First of all people want to know what DNA is composed of human love is always asked at the end of this shaver. The results have a called Levin of scientists through research, found that DNA from four of the smaller things, these four things name is the total nucleotide, like four brothers, all of them named nucleotide, But names are different, are adenine (A), guanine (G), cytosine (C) and thymine (T), the four names to remember, but remember that as long as the DNA is from four Nucleotide only casually together, and they have no connection to each other laws, but later nucleotides in fact not the same, and their mutual combination of the ever-changing methods of great mystery. Even a single nucleotide into a chain, linked by two nucleotide a certain order, and then twisted into a "Serratula" kind, a deoxyribonucleic acid (DNA) of the molecular structure. In this structure, every three bases can form a genetic "password" and a DNA base pairs on as many as several million, so each DNA is a significant genetic code books, the inside of the genetic information In countless more, this DNA molecule found in the nucleus on the chromosome. They will pass with cell division genetic code.