Biology Tutor Resources

Gel loading buffer contains 20% glycerol. What effect do you think this has on the density of your DNA sample? Why is this advantageous when loading samples into an agarose gel?

Which would you expect to travel further in a gel electrophoresis experiment, a piece of DNA consisting of 700 bp or 250 bp? Explain your answer in terms of the physical properties of agarose gel...

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