U fiirso qoraalka hoose ka dibna ka jawaab su'aasha kadib isla luqadda qoraalka:  Gelitaanka: Nucleases-ku waa enzymes-yada gooya xargaha DNA-da iyagoo kicinaya hydrolysis-ka isku xidhka phosphodiester. Nucleases-ka oo ka soo saara nucleotida dhamaadka DNA-da waxaa loo yaqaanaa exonucleases, halka endonucleases-ka ay ka soo saaraan gudaha. Nucleases-ka ugu badan ee loo isticmaalo molecule-yada bayolojiga waa endonucleases-ka xaddidaadda, kuwaas oo gooya DNA-da taxane gaar ah. Tusaale ahaan, enzyme-ka EcoRV ee bidix ka muuqda wuxuu aqoonsanayaa taxanaha 6-saldhig 5′-GATATC-3′ wuxuuna goynayaa khadka toosan. Dabeecadda, enzymes-yadaani waxay ka ilaaliyaan bakteeriyada infekshanka phage iyagoo dheefshiidka DNA-ga phage marka ay galaan unugyada bakteeriyada, iyagoo qayb ka ah nidaamka wax ka beddelka xaddidaadda. Tiknoolajiyada, nucleases-yada taxanaha u gaarka ah waxaa loo isticmaalaa qaab-dhismeedka molecule-yada iyo farta DNA-ga.  Su'aal: Ensaamka EcoRV muxuu ka garanayaa?
Liiska 6-saldhig 5′-GATATC-3