What is the energy transformation as the fragments move through the gel? A. Electric potential energy to kinetic energy B. Electric potential energy to thermal energy C. Electric potential energy to kinetic energy and thermal energy D. Kinetic energy to thermal energy

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32. What is the energy transformation as the fragments move through the gel?

A. Electric potential energy to kinetic energy

B. Electric potential energy to thermal energy

C. Electric potential energy to kinetic energy and thermal energy

D. Kinetic energy to thermal energy

Questions 30 through 32 concern Figure Q21.30,
which shows the configuration of a gel electro-
phoresis experiment. Charged plates establish
an electric field on a region of gel between the
plates. A solution of DNA fragments, which
acquire a negative charge in solution, is ana-
lyzed by using an electric field to drive the frag-
ments through the gel. A drag force opposes the
motion, causing the fragments to move at a con-
stant speed. Larger fragments move more slowly,
so the fragments separate by size to give a “fin- FIGURE Q21.30
gerprint" of the sample.
Transcribed Image Text:Questions 30 through 32 concern Figure Q21.30, which shows the configuration of a gel electro- phoresis experiment. Charged plates establish an electric field on a region of gel between the plates. A solution of DNA fragments, which acquire a negative charge in solution, is ana- lyzed by using an electric field to drive the frag- ments through the gel. A drag force opposes the motion, causing the fragments to move at a con- stant speed. Larger fragments move more slowly, so the fragments separate by size to give a “fin- FIGURE Q21.30 gerprint" of the sample.
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