Zamoyo

Kapangidwe ka Chromosome mu Zamoyo Ma Chromosome ndi chimodzi mwa zigawo zofunika kwambiri m'maselo amoyo, zomwe zimakhala ngati "chotengera" chachikulu cha chidziwitso cha majini. Mkati mwa ma chromosome, DNA imasungidwa, yokhala ndi majini omwe amawongolera makhalidwe, ntchito za thupi, ndi kukula kwa chamoyo kuchokera ku selo limodzi kupita ku munthu wathunthu. Kapangidwe ka ma chromosome ndi kosangalatsa osati kokha chifukwa cha mawonekedwe ake komanso chifukwa cha... Werengani zambiri

Kuyika DNA mu Selo Nucleus M'selo lililonse la eukaryotic—monga la anthu, nyama, zomera, ndi bowa—mumasungidwa malangizo a moyo mu mawonekedwe a DNA (deoxyribonucleic acid). Ngati DNA yochokera ku selo limodzi la munthu ikadatsegulidwa, ikanakhala yayitali mamita awiri. Vuto: kodi chingwe chachitali choterechi chingalowe bwanji mu selo, lomwe lili ndi mainchesi ochepa okha m'mimba mwake? … Werengani zambiri

Ma Histones ndi Kapangidwe ka Chromatin Mu nucleus ya maselo a eukaryotic, DNA siilipo ngati "ulusi" womwe sunasokonezedwe. Ngati DNA yonse ya anthu ikadatsegulidwa, ikanakhala yayitali pafupifupi mamita awiri, ngakhale kuti nucleusyo ndi mainchesi ochepa okha m'mimba mwake. Pofuna kuwonetsetsa kuti kutalika kwakukulu kwa zinthu za majini kumatha kulowa pamene kuli kofunikira kuti zinthu zamoyo ziyende bwino, selo... Werengani zambiri

DNA Methylation mu Gene Expression DNA methylation ndi imodzi mwa njira zofunika kwambiri za epigenetic, zomwe zimayang'anira nthawi komanso mphamvu ya jini popanda kusintha DNA base sequence yokha. Mwanjira ina, chidziwitso cha majini chimakhalabe chomwecho, koma "kuwerenga" kwake kumatha kusintha. Njirayi imagwira ntchito yayikulu pakukula kwa mwana wosabadwayo, kusiyanitsa maselo, kusunga mawonekedwe a minofu, ndi… Werengani zambiri

Epigenetics mu Malamulo a Gene Epigenetics ndi nthambi ya zamoyo yomwe imaphunzira kusintha kwa ntchito za majini komwe sikumachitika chifukwa cha kusintha kwa DNA. Mwa kuyankhula kwina, epigenetics imafotokoza momwe majini angayambitsidwire kapena kuzimitsidwa popanda kusintha code ya majini yokha. Lingaliro ili ndi lofunika kwambiri chifukwa limatithandiza kumvetsetsa chifukwa chake maselo m'thupi omwe ali ndi DNA yofanana amatha… Werengani zambiri

Ma Genome a Prokaryotic mu Biology ya Molecular Ma genome a Prokaryotic ndi maziko ofunikira a biology ya molecular, kusonyeza momwe moyo, pamlingo wake wosavuta, umasungira, kufotokozera, ndi kutumiza chidziwitso cha majini. Ma Prokaryotes—omwe akuphatikizapo mabakiteriya ndi ma archaea—ali ndi magulu ang'onoang'ono a majini poyerekeza ndi ma eukaryotes, komabe ndi zitsanzo zabwino kwambiri zomvetsetsa mfundo zazikulu za kubwerezabwereza kwa DNA, kuwongolera majini, kusintha kwa majini, ndi… Werengani zambiri

Kapangidwe ka Majini mu Maselo a Eukaryotic Majini m'maselo a eukaryotic—monga a nyama, zomera, bowa, ndi akatswiri—ali ndi dongosolo lovuta komanso lokonzedwa bwino. Mosiyana ndi ma prokaryotes, omwe nthawi zambiri amakhala ndi DNA yozungulira yomwe ili m'dera limodzi (nucleoid), maselo a eukaryotic amasunga majini awo ambiri mkati mwa nyukiliyasi mu mawonekedwe a ma chromosome olunjika. Kuti DNA yomwe… Werengani zambiri

Kugwirizanitsa Majini mu Sayansi ya Mamolekyu Kugwirizanitsa majini ndi chimodzi mwa zinthu zofunika kwambiri mu sayansi ya mamolekyu, zomwe zimathandiza kuti zinthu za majini zisinthe, kukonzedwanso, kapena kubwezeretsedwanso. Njirayi imagwira ntchito yofunika kwambiri popanga kusintha kwa majini, kusunga kukhazikika kwa majini, komanso kukonza kuwonongeka kwa DNA. Mu zamoyo—kuyambira mabakiteriya mpaka anthu—kuphatikizanso ndi chida chachilengedwe chosungira moyo… Werengani zambiri

Kukonza DNA mu Kukhazikika kwa Majini Kukhazikika kwa majini ndi kuthekera kwa majini a chamoyo kusunga dongosolo ndi kapangidwe kake ka DNA pakapita nthawi. Kukhazikika kumeneku ndikofunikira chifukwa DNA imasunga malangizo achilengedwe omwe amayang'anira pafupifupi ntchito iliyonse ya selo, kuyambira kugawikana ndi kagayidwe kachakudya mpaka mayankho a chilengedwe. Komabe, DNA si molekyulu yokhazikika bwino. Tsiku lililonse, … Werengani zambiri

Kusintha kwa majini mu machitidwe a zamoyo Kusintha kwa majini ndi kusintha kosatha mu dongosolo la DNA, zomwe ndi zinthu zazikulu za majini pafupifupi zamoyo zonse. Kusintha kumeneku kumatha kuchitika mu "chilembo" chimodzi cha DNA (maziko a nayitrogeni) kapena mu gawo lalitali. Ngakhale kuti mawu oti "kusintha" nthawi zambiri amagwirizanitsidwa ndi matenda kapena china chake chovulaza, mu machitidwe a zamoyo kusintha kwenikweni... Werengani zambiri