polar molecules are unable to go across unless
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unless they path through aqueous channels ( protein channels ) they can't pass through the lipid bi-layer as it is non-polar
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Answer:
The answer to this question can be re-written as “Polar molecules are unable to go across unless they pass through the channels in the cell membranes.”
It is the cell membranes that control the movements of any substances, and they act as a sensitive, selective membrane.
They are the main barrier to allow substances in or out.
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