Lub hauv paus qauv ntawm eukaryotic chromosomes yog dab tsi?
Lub hauv paus qauv ntawm eukaryotic chromosomes yog dab tsi?

Video: Lub hauv paus qauv ntawm eukaryotic chromosomes yog dab tsi?

Video: Lub hauv paus qauv ntawm eukaryotic chromosomes yog dab tsi?
Video: Vajtswv Txoj Lus | “Vajtswv Yog lub Hauv Paus ntawm Tib Neeg Txoj Sia” 2024, Kaum ib hlis
Anonim

Eukaryotic chromosomes muaj cov DNA-protein complex uas yog tsim nyob rau hauv ib tug compact yam uas tso cai rau lub loj npaum li cas ntawm DNA yuav tsum tau muab cia rau hauv lub nucleus ntawm lub cell. Lub subunit npe ntawm lub chromosome yog chromatin. Lub hauv paus ntawm chromatin yog nucleosome.

Ib yam li ntawd, eukaryotic chromosome muaj li cas?

Nyob rau hauv sib piv, nyob rau hauv eukaryotes , tag nrho cov cell chromosomes yog khaws cia rau hauv ib tug qauv hu ua lub nucleus. Txhua eukaryotic chromosome yog tsim los ntawm DNA coiled thiab condensed nyob ib ncig ntawm nuclear proteins hu ua histones.

Ib yam li ntawd, tus qauv ntawm cov kab mob chromosome yog dab tsi? Prokaryotic cells (cov kab mob) muaj lawv cov chromosome li ncig DNA . Feem ntau tag nrho cov genome yog ib lub voj voog, tab sis feem ntau muaj cov voj voog ntxiv hu ua plasmids. Cov DNA yog ntim los ntawm DNA - khi cov protein.

Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog qhov uas ua rau DNA eukaryotic chromosome?

Txhua chromosome muaj enormously ntev linear DNA molecule txuam nrog cov proteins uas quav thiab ntim cov xov zoo ntawm DNA mus rau hauv ib tug ntau compact qauv. Lub nucleosome muaj xws li a DNA ob chav helix khi rau ib qho octamer ntawm cov tub ntxhais histones (2 dimers ntawm H2A thiab H2B, thiab H3 / H4 tetramer).

Muaj pes tsawg chromosomes nyob rau hauv eukaryotes?

46 chromosome ua

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