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Old 11-08-2014
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Default Question in genetics

A group of investigators is studying a segment
of the human genome that evidences an interindividual
variation in the number of nucleotides.
They isolate a DNA segment of interest
by running it on electrophoresis gel. They remove
the portion of gel with the DNA and subsequently
expose it to a labeled DNA probe.
Which of the following laboratory techniques
does this describe?
(A) Enzyme-linked immunosorbent assay
(B) Northern blot
(C) Polymerase chain reaction
(D) Sequencing
(E) Southern blot
(F) Southwestern blot
(G) Western blot
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Old 11-08-2014
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E because they are not looking for RNA (north), protein (west), DNA-binding protein (south-west), expanding DNA (PCR), looking for complementary sequence (sequencing), not looking for Anti-bodies (immunoassay)
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Old 11-09-2014
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Thanks a lot
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