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12th Class Biology Sample Paper Biology - Sample Paper-1

  • question_answer
    (i) Name the substance used as a medium/matrix in gel electrophoresis.
    (ii) Why does DNA move towards the anode in gel electrophoresis?
    (iii) Name the compound used for staining the isolated DNA in the gel electrophoresis.

    Answer:

    (i) Agarose.                                                                                                                                     
    (ii) The DNA fragments are negatively charged so they move towards the positively charged anode.            
    (iii) Ethidium bromide.                                                                                                                                  


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