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|1||heateh||100%||0:06.3 min.||12 Jan, '10|
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|8||SpikyMango||100%||0:10.6 min.||11 Dec, '15|
This is an online quiz called Membrane Transport in the Cell
There is a printable worksheet available for download here so you can take the quiz with pen and paper.
Polar molecules cannot enter the cell membrane because of the hydrophobic interior of the lipid bilayer. Using transport proteins, however, there are three ways of transporting small molecules across the membrane.
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