The plasma membrane consists mainly of

Options

A. phospholipids embedded in a protein bilayer
B. proteins embedded in a phospholipid bilayer
C. proteins embedded in a polymer of glucose
D. proteins embedded in a carbohydrate bilayer

Answer

B

Explanation

According to fluid mosaic model given by Singer and Nicolson (1972), plasma membraneconsists of a continuous bilayer of phospholipid molecules. in which globular proteins are embedded. This arrangement corresponds to ice bergs (proteins) floating in a sea of phospholipids.Proteins stay in the membrane because they have regions of hydrophobic amino acids which interact
with fatty acid tails to exclude water. Rest of themolecule is hydrophilic, which faces into or outward, both of which are aqueous environment