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Biology · Principles and Processes in Biotechnology

हिन्दी

In agarose gel electrophoresis, DNA fragments move towards the anode because DNA molecules carry a net charge that is:

  1. Positive, due to nitrogenous bases
  2. Negative, due to phosphate backbone
  3. Neutral, due to hydrogen bonding
  4. Amphoteric, depending on gel pH

Correct answer · Option 2

Negative, due to phosphate backbone

Explanation

DNA fragments are negatively charged molecules due to phosphate groups, so they move towards the positively charged anode under an electric field.
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