जैव प्रौद्योगिकी में प्रयुक्त 'आणविक कैंची' (molecular scissors) शब्द विशेष रूप से किस प्रकार के एंजाइमों को संदर्भित करता है?

A scientist inserts a foreign DNA fragment into the tetracycline resistance gene of plasmid pBR322 at a BamHI site. The transformed bacteria are first grown on ampicillin medium and then transferred to tetracycline medium. Which observation confirms recombinant bacteria?

Match Column I with Column II and select the correct option: Column I A. EcoRI B. Elution C. Gel matrix D. Sticky ends Column II1. Agarose2. Restriction endonuclease3. DNA extraction from gel4. Hydrogen bonding