All GRE Subject Test: Chemistry Resources
Example Questions
Example Question #1 : Electrochemical Analyses
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
It is impossible to tell without knowing the size of the DNA fragments
Red section
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.
Nate
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University of Wisconsin-Oshkosh, non degree, Prepharmacy. University of Wisconsin-Madison, Pharmaceutical Chemist, Pharmacy.
Gregory
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Pennsylvania State University-Main Campus, Bachelor of Science, Chemical Engineering. Carnegie Mellon University, Doctor of P...
All GRE Subject Test: Chemistry Resources
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