Complete the sentence. some molecules are too big to pass through the phospholipid bilayer of the cell membrane. these molecules need to pass through that are embedded in the cell membrane.

a) proteins
b) ribosome
c) cell wall
d) carbohydrates

The best and most correct answer among the choices provided by your question is the first choice or letter A. These molecules need to pass through proteins that are embedded in the cell membrane.

Integral proteins are embedded within the lipid bilayer. They cannot easily be removed from the cell membrane without the use of harsh detergents that destroy the lipid bilayer. Integral proteins float rather freely within the bilayer, much like oceans in the sea.

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