Question

Read the following statements and select the correct ones.(i) Electrophoresis is a technique used for the separation of molecules based on their size and charge(ii) Plasmids are extra-chromosomal, self-replicating, usually circular, double stranded DNA molecules found naturally in many bacteria and also in some yeast(iii) It is not advisable to use an exonuclease enzyme while producing a recombinant DNA molecule(iv) In EcoRI, the roman numeral I indicates that it was the first enzyme isolated from E.coli RY 13

• A. (i) and (ii)
• B. (iii) and (iv)
• C. (i), (ii) and (iv)
• D. (i), (ii), (iii) and (iv)

Answer 1

The correct option is D (i), (ii), (iii) and (iv)

All the statements given in the question are correct .

• Electrophoresis is a technique used for the separation of molecules based on their size and charge.
  
• Plasmids are extra-chromosomal, self-replicating, usually circular, double stranded DNA molecules found naturally in many bacteria and also in some yeast.
  
• It is not advisable to use an exonuclease enzyme while producing a recombinant DNA molecule.
  
• In EcoRI, the roman numeral I indicates that it was the first enzyme isolated from E.coli RY 13.
  
• So, the correct option is 'Option D' .