All GRE Subject Test: Chemistry Resources
Example Questions
Example Question #351 : Gre Subject Test: Chemistry
Once a sample of DNA is isolated, it is loaded on an agarose electrophoresis gel, as shown below. Once the sample has run, where will the student find the DNA?
Possible Answers:
Green section
It is impossible to tell without knowing the charge of the DNA
Red section
It is impossible to tell without knowing the size of the DNA fragments
Correct answer:
Green section
Explanation:
DNA is negatively charged, so it will migrate toward the positive electrode during electrophoresis. As a result, it will migrate from the center line into the green region of the gel.
Kimberly
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University of Connecticut, Bachelor of Chemistry, Chemistry. University of Connecticut, Doctor of Philosophy, Organic Chemist...
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All GRE Subject Test: Chemistry Resources
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