2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub sijhawm, ntau lub phage tshiab tau tsim sai, thaum lwm lub sijhawm, phage tshiab tsuas yog tsim ntau tiam kab mob tom qab. Nyob rau thaum ntxov 1950s André Lwoff tau piav qhia txog qhov txheej txheem no, hu ua lysogeny, ua haujlwm li cas.
Leej twg pom thawj tus kab mob bacteriophage?
Bacteriophage, tseem hu ua phage lossis kab mob kab mob, ib pawg ntawm cov kab mob uas kis kab mob. Bacteriophages tau pom nws tus kheej los ntawm Frederick W. Twort hauv Great Britain (1915) thiab Félix d'Hérelle hauv Fabkis (1917).
Leej twg pom lytic thiab lysogenic voj voog?
Lawv tau pom nws tus kheej los ntawm ob tus kws tshawb fawb, Frederick William Twort 1 ntawm University of London xyoo 1915, thiab Félix d'Herelle 2 leej twg lees paub qhov kev tshawb pom thiab tsim lub sijhawm bacteriophage hauv xyoo 1917 thiab tau kawm ntau yam txij li thaum.
Lub hom phiaj ntawm Lysogeny rau cov kab mob bacteriophage yog dab tsi?
Lub virion capsid muaj peb lub luag haujlwm: (1) tiv thaiv tus kab mob nucleic acid los ntawm kev zom zaub mov los ntawm qee cov enzymes (nucleases), (2) txhawm rau muab cov chaw ntawm nws qhov chaw. lees paub thiab txuas (adsorb) cov virion rau receptors nyob rau saum npoo ntawm lub xov tooj ntawm tes, thiab, hauv qee cov kab mob, (3) muab cov proteins uas tsim ib feem ntawm …
Qhov txiaj ntsig tseem ceeb ntawm Lysogeny yog dab tsi?
Lysogeny tiv thaiv tus kab mob los ntawm ib puag ncig yam(xws li, tsis ua haujlwm los ntawm UV tshav ntuj lossis kev zom zaub mov proteolytic)uas tej zaum yuav ua rau tus kab mob capsid los yog nucleic acid puas thaum lub sij hawm sib tham txog "kev tiv thaiv" rau tus tswv tsev los ntawm kev qhia cov noob uas tiv thaiv kev sib kis los ntawm lwm cov kab mob (Jiang and Paul, 1996).
Pom zoo:
Leej twg nrhiav tau induced haum txoj kev xav?
Tus qauv tsim kom haum yog thawj zaug los ntawm Koshland hauv xyoo 1958 los piav qhia txog kev hloov pauv ntawm cov protein hauv cov txheej txheem khi. Cov qauv no qhia tau hais tias ib qho enzyme, thaum khi nrog nws cov substrate, optimizes lub interface los ntawm lub cev kev sib cuam tshuam los tsim ib tug complex qauv.
Leej twg nrhiav tau sulfuric acid?
Qhov kev tshawb pom ntawm sulfuric acid tau lees paub rau 8th caug xyoo alchemist Jabir ibn Hayyan. Sulfuric acid ua ntej li cas? Nyob rau xyoo pua 17th, German-Dutch chemist Johann Glauber tau npaj sulfuric acid los ntawm kev hlawv sulfur ua ke nrog ntsev (potassium nitrate, KNO 3 ), nyob rau hauv lub xub ntiag ntawm chav.
Leej twg nrhiav tau chorten kora?
Chorten Kora loj, tab sis tsis ze li qhov loj npaum li lub stupa ntawm Bodhnath hauv Nepal, tom qab ntawd nws tau ua qauv. Nws tau tsim nyob rau xyoo 1740 los ntawm Lama Ngawang Loday nco txog nws tus txiv ntxawm, Jungshu Phesan, thiab kom tshem tawm cov dab hauv zos.
Leej twg tau spayed thiab leej twg tau txais neutered?
Kev npam tus dev hais txog kev tshem tus poj niam dev lub cev xeeb tub, hos neutering yog hais txog cov txheej txheem uas ua rau txiv neej. Thaum tus poj niam tus dev tau spayed, tus kws kho tsiaj tshem nws zes qe menyuam thiab feem ntau nws lub tsev menyuam thiab.
Puas nrhiav tau lossis nrhiav tau?
Yog li, koj yuav tsum tau siv "could find". Lub modal verb, tau yog twb nyob rau hauv nws paste-form: ua. Yog li koj tsis tas yuav hloov pauv los nrhiav. Yuav nrhiav tau lossis nrhiav tau? "Ntaus" yog sib npaug. "
