Na u ka hlalosa tsela eo liphatsa tsa lefutso li itšoarang ka eona?
Ka tloaelo liphatsa tsa lefutso li bontša tšebetso ea tsona ka ho hlahisa liprotheine, e leng limolek'hule tse ikarabellang bakeng sa mesebetsi e mengata ea sele. Liprotheine li entsoe ka ketane e le 'ngoe kapa tse'maloa tsa polypeptide, e 'ngoe le e 'ngoe e entsoe ka tatellano ea li-amino acid. Ho latellana ha DNA ea liphatsa tsa lefutso ho sebelisoa ho hlahisa tatellano e itseng ea amino acid. Tshebetso ena e qala ka hore ho hlahisoe molek'hule ea RNA e nang le tatellano e lumellanang le tatellano ea DNA ea liphatsa tsa lefutso, e leng mokhoa o bitsoang ho ngola.  Molek'hule ena ea RNA ea lenģosa joale e sebeletsa ho hlahisa tatellano e lumellanang ea amino acid ka mokhoa o bitsoang phetolelo. Sehlopha se seng le se seng sa li - nucleotide tse tharo tse latellanang, se bitsoang codon, se tšoana le e 'ngoe ea li - amino acid tse mashome a mabeli tse ka khonehang ka har'a protheine kapa taelo ea ho felisa tatellano ea li - amino acid; ho tšoana hona ho bitsoa khoutu ea liphatsa tsa lefutso. Phallo ea boitsebiso ke ea unidirectional: boitsebiso bo fetisoa ho tloha ho latellanang ha nucleotide ho ea ho latellanang ha amino acid ea liprotheine, empa ha ho mohla e fetisoang ho tloha ho protheine ho ea ho latellanang ha DNA - ketsahalo eo Francis Crick a e bitsitseng thuto ea motheo ea limolek'hule tsa baeloji.  Ho latellana ho khethehileng ha li-amino acid ho fella ka mohaho o ikhethang oa mahlakore a mararo bakeng sa protheine eo,'me mehaho ea mahlakore a mararo ea liprotheine e amana le mesebetsi ea eona. Tse ling tsa tsona ke limolek'hule tse bonolo, tse kang likhoele tse entsoeng ke protheine ea collagen. Liprotheine li ka 'na tsa tlama liprotheine tse ling le limolek'hule tse bonolo, ka linako tse ling li sebetsa joaloka li-enzyme ka ho nolofalletsa lik'hemik'hale ka har'a limolek'hule tse tlamang (ntle le ho fetola sebopeho sa protheine ka boeona). Moralo oa protheine o fetoha; protheine ea hemoglobin e fetoha ka tsela e fapaneng hanyenyane ha e ntse e thusa ho hapa, ho tsamaisa le ho lokolla limolek'hule tsa oksijene maling a liphoofolo tse anyesang.