Question

Plasma membrane is made up of

• A. Carbohydrate layer
• B. Silicon layer
• C. cholesterol layer
• D. phospho lipid layer.

Answer 1

The correct option is D

phospho lipid layer.

The plasma membrane is composed mainly of phospholipids. They are arranged in two layers, called the phospholipid bilayer. Each phospholipid molecule has a head and two tails. The head “loves” water (hydrophilic) and the tails “hates” water (hydrophobic). The water-hating tails are on the interior of the membrane, whereas the water-loving heads point outwards, towards either the cytoplasm or the fluid that surrounds the cell.