Question

Reason for movement of DNA fragments towards anode in electrophoresis is DNA fragments being

• A. Negatively charged
• B. Positively charged
• C. Charged
• D. Charged with charges of both types

Hint:

Remember: DNA is negatively charged and always migrates to the positive pole in electrophoresis.

Answer 1

The Correct Option is A

Step 1: Property of DNA.
DNA molecules carry a negative charge due to the phosphate groups in their sugar-phosphate backbone.
Step 2: Principle of electrophoresis.
In gel electrophoresis, negatively charged DNA fragments migrate towards the positive electrode (anode) when an electric current is applied.
Step 3: Conclusion.
Therefore, DNA moves towards the anode because it is negatively charged.