2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Visualizing Transcription DNA yog ob-stranded, tab sis tsuas yog ib qho strand ua tus qauv rau kev hloov pauv txhua lub sijhawm. Cov template strand no hu ua noncoding strand.
Puas yog ob kab DNA tuaj yeem sau tau?
Tsis zoo li DNA replication, nyob rau hauv uas ob strands yog theej, tsuas yog ib tug strand yog transcribed. Cov strand uas muaj cov noob yog hu ua qhov kev nkag siab strand, thaum lub strand complementary yog antisense strand.
Vim li cas ob kab DNA tsis koom nrog kev sau npe?
(i) Ob txoj kab DNA tsis tau theej thaum lub sijhawm sau ntawv. … Ib ntu ntawm DNA yuav yog coding rau ob hom proteins, thiab qhov no yuav ua rau cov ntaub ntawv hloov pauv hloov tshuab ua rau nyuaj. Thib ob, ob lub RNA molecules yog tsim ib txhij yuav ua tiav rau ib leeg.
Puas tau sau ntawv tuaj yeem tshwm sim ntawm ob txoj hlua?
Daim duab 10-4. (a) DNA-RNA hybridization qhia tau hais tias txhua tus RNA cov ntaub ntawv sau tseg yog ntxiv rau tsuas yog ib txoj hlua ntawm niam txiv DNA. Hauv qhov piv txwv no, txhua tus ntawm ob DNA strands tau sau tseg, tab sis kev sau ntawv yog asymmetrical-tsuas yog ib txoj hlua yog sau (ntxiv …)
DNA transcription tshwm sim nyob qhov twg?
Nyob hauv eukaryotes, kev txhais lus thiab kev txhais lus muaj nyob rau hauv cov cellular compartments: transcription tshwm sim nyob rau hauv lub membrane-bounded nucleus, whereas translation tshwm sim nyob rau hauv lub nucleus.cytoplasm. Hauv prokaryotes, ob txheej txheem yog sib txuas ua ke (Daim duab 28.15).
Pom zoo:
Dab tsi ntawm qhov tshwm sim hauv qab no tau sim ua pov thawj los ntawm?
The Meselson thiab Stahl kev sim yog qhov kev sim ua pov thawj tias DNA rov ua dua yog ib nrab kev saib xyuas ib nrab kev saib xyuas Semiconservative replication piav qhia lub tshuab ntawm DNA rov ua dua hauv txhua lub hlwb paub. … Cov txheej txheem no hu ua semi-conservative replication vim hais tias ob daim ntawv luam ntawm tus thawj DNA molecule raug tsim.
Puas yog rov tshwm sim dua lossis rov tshwm sim dua?
Reoccur thiab recur yog verbs uas qhia ib lo lus hauv paus. Thaum lawv nyob ze heev ntawm lub ntsiab lus, lawv tsis zoo ib yam. Tej yam uas yog rov tshwm sim dua thiab dhau mus, tej zaum nyob rau ib ntus. Hauv qhov sib piv, ib yam dab tsi uas rov tshwm sim tsuas yog tshwm sim dua tab sis tsis tas yuav rov ua dua.
Cov kab kab kab kab kab ua kab mob txaus ntshai npaum li cas?
Nyob rau hauv peb thiab tom ntej instars ntawm lawv txoj kev loj hlob, Pine processionary caterpillars yog mob heev rau daim tawv nqaij ntawm tib neegthiab lwm yam tsiaj. Kev sib cuag yooj yim nrog cov plaub hau ntawm kab ntsig tuaj yeem ua rau pob khaus hnyav (urticaria) thiab khaus qhov muag, thiab qee tus neeg yuav muaj kev fab tshuaj.
Puas tau tshwm sim lossis tshwm sim?
Qhov kev qhia "tshwm sim" tsis tuaj yeem siv qhov khoom ncaj qha, thiab yog li ntawd nws tsis muaj daim ntawv passive, yog li tsis muaj "yog/was/be tshwm sim" tense. Puas tau tshwm sim los yog tshwm sim? Ob daim ntawv yog grammatically raug (tsis sib xws rau kev hais lus ntawm qee cov lus Askiv purists).
Puas tsis muaj qhov tshwm sim tshwm sim xav tau enzymes?
Tam sim no, enzymes TSIS ua rau cov tshuaj tiv thaiv tsis yog tus kheej. Txawm li cas los xij, enzymes ua kom nrawm nrawm ntawm cov tshuaj tiv thaiv tus kheej. Yeej, lawv ua kom cov tshuaj tiv thaiv sai dua. Enzymes ua qhov no los ntawm kev txo qis kev ua kom lub zog ntawm cov tshuaj tiv thaiv.
