Video: Leej twg tau pom tias DNA yog cov khoom siv caj ces ntawm t2 phage?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hershey thiab Chase tau ua cov kev sim classic qhia tias DNA yog cov khoom siv caj ces ntawm T2 phage.
Tsis tas li ntawd, leej twg tau qhia tias DNA tsis yog protein yog cov khoom siv caj ces ntawm bacteriophages?
Kev sim Hershey-Chase, uas ua qauv qhia tias cov genetic khoom ntawm phage yog DNA , tsis protein . Kev sim siv ob txheej ntawm T2 cov kab mob bacteriophages . Nyob rau hauv ib txheej, lub protein ntau lub tsho tiv no yog sau nrog radioactive sulfur (35S), tsis yog pom hauv DNA.
Vim li cas thiaj siv cov kab mob bacteriophage rau kev tshawb fawb los txiav txim seb cov noob yog tsim los ntawm DNA lossis cov proteins? Avery thiab nws pab pawg tau ntxiv cov enzymes uas paub tias tawg cov proteins , cov extract tseem hloov cov kab mob R mus rau S daim ntawv. Yog vim li cas kab mob bacteriophage ib qho kev xaiv zoo heev rau kev tshawb fawb los txiav txim seb cov noob yog tsim los ntawm DNA lossis cov proteins ? Vim nws yog ib qho yooj yim phage , DNA nyob ib puag ncig ib protein ntau lub tsho tiv no.
Qhov thib ob, Hershey thiab Chase tau ua pov thawj tias DNA yog cov khoom siv caj ces?
Hershey thiab Chase xaus qhov ntawd DNA tsis yog protein, yog cov cov khoom siv caj ces . Lawv txiav txim siab tias lub tsho tiv thaiv cov protein tau tsim nyob ib ncig ntawm cov kab mob bacteriophage, tab sis hais tias sab hauv DNA yog dab tsi conferred nws lub peev xwm los tsim progeny nyob rau hauv ib tug kab mob.
Puas yog tus tsim ntawm Hershey - caum kev sim thiab cov qauv ntawm t2 phage qhov txawv ntawm DNA thiab RNA raws li cov molecule ua cov khoom siv caj ces Vim li cas lossis vim li cas ho tsis?
Proteins muaj sulfur thiab tsis muaj phosphorus. Ua tus tsim ntawm Hershey - Chase sim thiab cov qauv ntawm T2 phage qhov txawv ntawm DNA thiab RNA raws li cov molecule ua cov khoom siv caj ces .? Yog vim li cas los yog vim li cas tsis yog ? Yog: Cov T2 pab , nyob rau hauv nws txoj kev paub tab, muaj tsawg heev, yog tias muaj, RNA.
Pom zoo:
Vim li cas DNA thiaj suav tias yog cov khoom siv caj ces?
Nrog rau kev zam ntawm qee yam kab mob, DNA ntau dua li RNA nqa cov txheej txheem caj ces hauv txhua lub neej hauv ntiaj teb. DNA yog ob qho tib si zoo dua thiab kho tau yooj yim dua li RNA. Raws li qhov tshwm sim, DNA ua haujlwm ruaj khov dua ntawm cov ntaub ntawv caj ces uas yog qhov tseem ceeb rau kev ciaj sia thiab kev yug me nyuam
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Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
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