All of the following are true of the plasma membrane, except
A. it is selectively permeable to various substances, controlling which substances can cross the membrane.
B. the glycocalyx provides structural integrity to the plasma membrane.
C. charged or large molecules can sometimes enter a cell via membrane proteins.
D. it is mainly composed of a phospholipid bilayer.
E. transmembrane proteins may function as ion channels, enzymes, or receptors.
Answer: B
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