OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a gel electrophoresis the short strands travel ____ distances while the long strands travel ____ distances.
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long, short
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short, long
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it depends on the charge
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None of the above
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Explanation:
Detailed explanation-1: -In gel electrophoresis, the shortest DNA fragments travel greater distances than the longest DNA fragments. DNA fragments are negatively charged, and the electric current created in the gel electrophoresis chamber causes the fragments to migrate toward the positively-charged end of the gel.
Detailed explanation-2: -The gel consists of a permeable matrix, a bit like a sieve, through which molecules can travel when an electric current is passed across it. Smaller molecules migrate through the gel more quickly and therefore travel further than larger fragments that migrate more slowly and therefore will travel a shorter distance.
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