NEET Biology question
Read the following statements and select the correct ones. 1. Electrophoresis is a technique used for the separation of molecules based on their size and charge. 2. Plasmids are extra-chromosomal, self-replicating, usually circular, double stranded DNA molecules found naturally in many bacteria and also in some yeast. 3. It is not advisable to use an exonuclease enzyme while producing a recombinant DNA molecule. 4. In EcoRI, the roman numeral I indicates that it was the first enzyme isolated from E. coli RY13.
Solution
Each statement is independently accurate — electrophoresis does separate molecules by size and charge, plasmids are indeed defined this way, an exonuclease would degrade the sticky ends
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