BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The portions of an integral membrane protein found inside the membrane are hydrophobic, while those that are exposed to the cytoplasm or extracellular fluid tend to be hydrophilic.

Detailed explanation-2: -The hydrophobic part of the cell membrane is the tail. The cell membrane is made of a phospholipid bilayer. Each phospholipid has two parts, a hydrophilic head and a hydrophobic tail.

Detailed explanation-3: -The hydrophobic part of the solvent-accessible surface of a typical monomeric globular protein consists of a single, large interconnected region formed from faces of apolar atoms and constituting approximately 60% of the solvent-accessible surface area.

Detailed explanation-4: -Thus, both surfaces of the plasma membrane are hydrophilic (“water-loving”). In contrast, the interior of the membrane, between its two surfaces, is a hydrophobic (“water-hating”) or nonpolar region because of the fatty acid tails.