Question

select all that apply
which of the following are essential functions of a living membrane? more than one answer may be correct
permit the exit of larger molecules
block the entrance of larger molecules
permit free diffusion of water
block the exit of water
permit free diffusion of proteins
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Explanation:

A living membrane is semi - permeable. It permits the free diffusion of small molecules like water (osmosis is the free diffusion of water across a semi - permeable membrane). At the same time, it blocks the entrance and exit of larger molecules (such as proteins which are large biomolecules).

Answer:

Permit the free diffusion of water, Block the entrance of larger molecules, Block the exit of larger molecules