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The plasma membrane is composed of _______________

(a) Carbohydrate bilayer

(b) Protein bilayer

(c) Lipid bilayer

(d) Vitamins

The question was posed to me at a job interview.

The query is from Brewing Yeast topic in division Brewing Yeast of Fermentation Technology

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The correct answer is (b) Protein bilayer

To explain: The plasma membrane is composed of the lipid bilayer of proteins. It constitutes of two layers of fat cells organized in two sheets. The lipid and protein molecules are held together by hydrogen bonding and are amphipathic in nature which stabilizes the lipid bilayer.

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