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This quiz contains 7 questions from a mix of 1 subtopics.
What is gel electrophoresis used for?
separating molecules based on shape
separating molecules based on size
separating molecules based on charge
separating molecules based on colour
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What is the purpose of submerging the gel in buffer solution during electrophoresis?
to make the samples visible
to maintain a stable and appropriate pH
to apply an electrical current
to prevent the gel from drying out
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Which electrode should the wells be positioned near when setting up the gel?
positive electrode (anode)
negative electrode (cathode)
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During electrophoresis, in which direction do DNA molecules move?
towards the positive electrode (anode)
towards the negative electrode (cathode)
they do not move
randomly in all directions
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Which fragments of DNA travel faster during electrophoresis?
larger fragments
the speed is not dependent on size
smaller fragments
all fragments travel at the same speed
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What does NOT affect the rate at which DNA fragments move through the gel?
the size of the fragments
the voltage applied
the pore size of the gel
the light intensity
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Describe how gel electrophoresis separates DNA fragments and how the results can be visualised.
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