Dab tsi yog qhov molecule ntawm RNA?
Dab tsi yog qhov molecule ntawm RNA?

Video: Dab tsi yog qhov molecule ntawm RNA?

Video: Dab tsi yog qhov molecule ntawm RNA?
Video: Koj pom dab tsi? What do you see? 2024, Kaum ib hlis
Anonim

ribonucleic acid / RNA . Ribonucleic acid ( RNA ) yog linear molecule tsim los ntawm plaub hom me me molecules hu ua ribonucleotide bases: adenine (A), cytosine (C), guanine (G), thiab uracil (U).

Yog li ntawd, RNA yog dab tsi thiab nws ua haujlwm li cas?

Cov kab mob cellular siv cov tub txib RNA (mRNA) los xa cov ntaub ntawv caj ces (siv cov nitrogenous hauv paus ntawm guanine, uracil, adenine, thiab cytosine, qhia los ntawm cov tsiaj ntawv G, U, A, thiab C) uas tswj cov synthesis ntawm cov proteins tshwj xeeb. Ntau tus kab mob encode lawv cov ntaub ntawv caj ces siv ib qho RNA genome.

Ib sab saum toj, dab tsi yog 3 hom RNA thiab lawv txoj haujlwm? Peb hom loj ntawm RNA yog mRNA , lossis tus xa xov RNA, uas ua haujlwm ib ntus luam ntawm cov ntaub ntawv pom hauv DNA; rRNA , los yog ribosomal ua RNA, uas ua haujlwm raws li cov qauv tsim ntawm cov qauv tsim cov protein hu ua cov ribosomes ; thiab thaum kawg, tRNA , los yog hloov RNA , lub ferry amino acids mus rau lub ribosome yuav tsum assembled

Tsis tas li ntawd, lub luag haujlwm ntawm RNA yog dab tsi?

Lub hauv paus dogma ntawm molecular biology qhia tias thawj lub luag haujlwm ntawm RNA yog hloov cov ntaub ntawv khaws cia hauv DNA rau hauv cov protein. Tshwj xeeb, tus tub txib RNA (mRNA) nqa cov qauv ntawm cov protein los ntawm lub cell DNA mus rau nws cov ribosomes, uas yog cov "tshuab" uas tsav cov protein synthesis.

Dab tsi yog nucleotides hauv RNA?

Zoo li DNA, RNA polymers yog tsim los ntawm chains ntawm nucleotides *. Cov nucleotides no muaj peb ntu: 1) tsib carbon ribose qab zib , 2) phosphate molecule thiab 3) ib qho ntawm plaub nitrogenous bases: adenine , guanine , cytosine los yog ua uracil.

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