Biotechniques | Principles of Gel Electrophoresis (DNA gels)

The video tutorial explains the principles of gel electrophoresis, focusing on DNA gels used to separate DNA molecules by size. It covers the structure of DNA, the mechanism of gel electrophoresis, preparation of agarose gels, and the use of intercalating agents for visualization. The tutorial also discusses interpreting gel results, including estimating DNA fragment sizes using a molecular weight ladder and constructing a standard curve. Finally, it explains how DNA bands are visualized using UV light and intercalating dyes.

What is a molecular weight ladder and how is it used in gel electrophoresis?

How can you determine the size of DNA fragments after electrophoresis?

What factors influence the migration of DNA fragments in a gel?

Discuss the importance of constructing a standard curve in gel electrophoresis.