http___livro-ensino-medio.f1cf.com.br_biologia_hr_biology-35.html_1.xml
1.1 2.1 3.1 4.1 5.1 6.1 7.1 8.1 9.1 11.1 12.1 13.1 14.1 15.1 16.1 17.1 18.1 19.1 20.1 21.1 22.1 23.1 24.1 25.1
Biology Thus, science continues to wonder: How are you? What is its structure? Because of the improvement of the microscope and with the contributions of microbiology and medicine was possible to identify the microorganisms with the majority of diseases. With the development of research on the virus, it was possible to identify the existence of a perfect biochemical relationship between the molecular nature of each type of virus and certain specific receptors on cell surfaces, which justifies the tropism of virus for certain types of fabrics. Thus, the influenza virus attacks the cells of the respiratory tract, the of hydrophobia (rabies) attacks the cells of the nervous system mumps affects the parotid glands, the AIDS destroys the immune lymphocytes t_a_4. Thus, viruses are often classified as pneumotrópicos, neurotropic, adenotrópicos, dermotropic, or according to the cell type with which the relationship is established biochemistry. HIV T lymphocyte Photomicrograph of the HIV virus and lymphocyte T4. HIV recognizes the CD4 membrane protein present in lymphocytes and macrophages t_a_4, binding to this protein. Source: GNU Free Doc License, www.wikipedia.org What is the contribution of the electron microscope for the study of these beings? As you've noticed, they are extremely small beings. Its dimensions are between 10 to 300 nanometers (nm), visible only under the electron microscope. The amazing thing is that we shoot in the electron microscope, has acknowledged that the basic structure of all viruses (Figure 2) is the same, ie, did not have cellular structure. They are endowed with a kernel (core) of nucleic acid (DNA or RNA) encased in a protein capsid known that, in turn, is composed of units called capsomeres. They may have the genetic material consists of double-stranded DNA (DNAfd), single-stranded DNA (DNAfu) or single-stranded RNA (RNAfu), but in no case is the presence of the two acids in the same virus. The meeting of the nucleic acid with the capsid forms the nucleocapsid of the virion, which Figure 2 - Representation of a virus. Virus: "poisonous fluid"
1.1 2.1 3.1 4.1 5.1 6.1 7.1 8.1 9.1 11.1 12.1 13.1 14.1 15.1 16.1 17.1 18.1 19.1 20.1 21.1 22.1 23.1 24.1 25.1
Biologija Dakle, znanost i dalje pitaju: Kako ste vi? Što je njegova struktura? Zbog poboljšanja u mikroskop i doprinosi za mikrobiologiju i medicine je moguće identificirati mikroorganizme s većinom bolesti. S razvojem istraživanja na virus, što je moguće utvrditi postojanje savršenog biokemijske molekularne veze između prirode svake vrste virusa i nekih specifičnih receptora na stanične površine, što opravdava tropizma od virusa za određene vrste tkanina. Dakle, virus gripe napada stanice respiratornog trakta, od bjesnilo (bjesnoća) napada stanice živčanog sustava od zaušnjaka utječe na parotidnoj žlijezde, AIDS-a uništava imunološki limfocita t_a_4. Dakle, virusi često se klasificiraju kao pneumotrópicos, neurotropic, adenotrópicos, dermotropic, odnosno prema vrstama stanica s kojima je uspostavljen odnos biokemiju. HIV T limfocita Fotomikrografija od virusa HIV-a i T4 limfocita. HIV prepoznaje proteina CD4 membrane prisutna u limfocita i makrofaga t_a_4, obvezujuća za ovog proteina. Izvor: GNU Free License Doc, www.wikipedia.org Što je doprinos elektronskim mikroskopom za proučavanje tih bića? Kao što ste primjetili, oni su iznimno male bića. Njegove dimenzije su između 10 do 300 nanometara (nm), vidljiva samo pod elektronskim mikroskopom. Nevjerojatna stvar je da smo pucati u elektronskim mikroskopom, priznao je da je osnovna struktura svih virusa (slika 2) je isti, odnosno, nisu imali stanične strukture. Oni su obdareni kernel (jezgra) nukleinskih kiselina (DNA ili RNA) uvukla u proteina kapsidnih poznato da je, pak, sastoji se od jedinica zove capsomeres. Oni mogu imati genetski materijal se sastoji od dvostrukog DNK (DNAfd), single-DNK (DNAfu) ili jednolančana RNA (RNAfu), ali ni u kojem slučaju je prisutnost dviju kiselina u istim virusom. Sastanak nukleinske kiseline s omotačem čini nucleocapsid od virion, koji Slika 2 - Zastupanje virusa. Virus: "otrovne tekućine"