The relative impermeability of membranes to

water soluble molecules is a result of



a. the nonpolar nature of water.
b. the presence of large proteins that extend
through both sides of membranes.
c. the presence of inorganic salt crystals
scattered through some membranes.
d. the presence of cellulose and waxes.
e. the presence of phospholipids in the lipid
bilayer.


E

Biology & Microbiology

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What can be said about peptide hormones?

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