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7 / 10  When using an EIA to study microtubules or other structures inside a cell, we first chemically fix the cell and then treat the cells with alcohol. What is the purpose of this alcohol treatment?
A  It makes holes in the cell membrane large enough for antibodies to pass.
B  It makes the membrane sticky so antibodies will bind and be taken up by receptor-mediated endocytosis.
C  It removes negative charges from the membrane, which would otherwise repulse the antibodies.
D  It prevents nonspecific binding of the antibodies to the cell membrane.

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Source:  OpenStax, Microbiology. OpenStax CNX. Nov 01, 2016 Download for free at http://cnx.org/content/col12087/1.4
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