Ravandhoi biokhimiyavie, ki dar hujayra ba amal meoyand, bevosita ba sokhtori hujayrai zin- da vobasta buda, har yaki onho yagon vazifaro ijro mekunand.
CHunin sokhtori hujayrahoro organoid meno- mand va onho hamchun uzvhoi tomi organizm vazi- fai makhsusro ijro mekunand.
Olimon zimni tadqiqote, ki bo yorii asbobhoi hozirazamon guzaronidaand, imkon pay- do kardand, ki nozukihoi sokhti hujayraro omukh- ta, hamai organizmhoi zindaro az jihati sokhtor ba organizmhoi behasta – beyadro (prokariotho) va hastador – yadrodor (eukariotho) judo kunand. Ba guruhi prokariotho bakteriyaho va obsabzhoi kabudi sabz, ba guruhi eukariotho zanburugho, rustaniho va hayvonot mansuband.
Organizmhoi prokarioti khususiyathoi sokhtori qadimaro ni- goh doshta, khele soda meboshand, baroi hamin onhoro ba olami alohida judo mekunand. Organizmhoi eukarioti pardai hastai (yadroi) doshta, sokhtashon murakkab ast: doroi qarorgohi ener- getiki – mitokhondriya meboshand. Ba iborai digar, sokhti hamai hujayrahoi hastador (eukariotho) murakkab buda, qobiliyati az khud kardani oksigenro dorand va energiyai ziyod hosil mekunand.