2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
lub cell ua haujlwm li qub, zoo li ua cov protein. DNA tsis muaj kab mob yog hu ua . chromatin.
Tsis tas li ntawd, dab tsi yog uncoiled DNA hu ua?
DNA (chromatin) replicates nws tus kheej. Dab tsi yog uncoiled , txoj hlua DNA npe ? Nws yog hu ua chromatin.
Tom qab, lo lus nug yog, pes tsawg daim ntawm chromatin tib neeg lub hlwb muaj? Chromosomes 1–22 yog suav nrog kwv yees qhov loj me. Ib yam tib neeg somatic (tsis yog kab mob) cell muaj ob ntawm txhua tus ntawm no chromosomes , ntxiv rau ob qho kev sib deev chromosomes -ob X chromosomes hauv (ntxiv) Cov zaub ntawm 46 tib neeg chromosomes ntawm mitosis yog hu ua tib neeg karyotype.
Yog li ntawd, cov cell ywj siab pib tsim thaum twg?
Meiosis II yog ib qho mitotic faib ntawm txhua tus haploid hlwb tsim nyob rau hauv meiosis I. Thaum lub sij hawm prophase II, lub chromosomes condense, thiab ib txheej tshiab ntawm spindle fibers cov ntaub ntawv. Cov chromosomes pib txav mus rau txoj kab nruab nrab ntawm lub cell.
Vim li cas cov kab mob ua meiosis?
Meiosis yog xav tau los ua gametes rau kev sib deev. Hauv kev sib deev kev sib deev, Eukaryotic hlwb ua kab mob nrog kev sib txuas tshiab ntawm chromosomes los ntawm kev sib xyaw DNA ntawm ob niam txiv.
Pom zoo:
Sociobiology yog dab tsi thiab dab tsi yog qhov kev thuam loj ntawm nws?
Ib feem ntawm sociobiology cuam tshuam nrog kev coj tus cwj pwm tsis zoo feem ntau. Cov neeg thuam tau hais tias daim ntawv thov ntawm sociobiology no yog ib hom kev txiav txim siab caj ces thiab nws ua tsis tau raws li qhov nyuaj ntawm tib neeg tus cwj pwm thiab qhov cuam tshuam ntawm ib puag ncig ntawm tib neeg txoj kev loj hlob
Dab tsi yog cov hlau nplaum uas ua los ntawm qhov kev npaj ntawm electrons yog dab tsi?
Electrons yog teem rau hauv plhaub thiab orbitals nyob rau hauv ib tug atom. Yog hais tias lawv sau lub orbitals kom muaj ntau spin taw tes rau hauv qab (los yog vice versa), txhua atom yuav ua zoo li ib tug me me hlau nplaum. Thaum ib daim ntawm cov hlau tsis muaj hlau nplaum (lossis lwm yam khoom siv ferromagnetic) raug rau sab nraud magnetic teb, ob yam tshwm sim
Dab tsi yog Qhov Ib Feem Cuam Tshuam ntawm cov khoom hydrogen hauv cov methane ch4 yog dab tsi?
Cov feem pua ntawm cov ntsiab lus los ntawm Element Element Symbol Mass Percent Hydrogen H 25.132% Carbon C 74.868%
Dab tsi yog cov reagents xav tau rau PCR thiab dab tsi yog qhov ua haujlwm ntawm txhua tus?
Muaj tsib yam tshuaj reagents, lossis cov khoom xyaw, siv hauv PCR: qauv DNA, PCR primers, nucleotides, PCR tsis thiab Taq polymerase. Primers feem ntau yog siv nyob rau hauv khub, thiab DNA ntawm ob lub primers yog amplified thaum lub sij hawm PCR cov tshuaj tiv thaiv
Dab tsi yog junk DNA thiab nws lub hom phiaj yog dab tsi?
Hauv cov noob caj noob ces, lo lus khib nyiab DNA hais txog thaj tsam ntawm DNA uas tsis yog coding. Qee qhov DNA noncoding no yog siv los tsim cov khoom tsis yog RNA xws li hloov RNA, tswj RNA thiab ribosomal RNA