Gel Electrophoresis Is a Useful Tool in DNA Cloning

question 21

Multiple Choice

Gel electrophoresis is a useful tool in DNA cloning. At a neutral pH, when voltage is applied, DNA fragments will migrate toward the anode because:

• A) DNA is negatively charged due to its glycine backbone.
• B) DNA is negatively charged due to its phosphate backbone.
• C) DNA is positively charged due to its glycine backbone.
• D) DNA is positively charged due to its phosphate backbone.

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