In certain types of genetic engineering, DNA is injected into the nucleus of a recipient animal cell. What is the fewest number of membranes that must be pierced by the microscopic needle in order to inject the DNA? (Note that the needles used are not small enough to pass through a nuclear pore.)

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asked May 30, 2013 in Biology by anonymous
    

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answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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