The head of the molecules of the plasma membrane face towards the outside.
Answer: Option A
Explanation:
Phospholipids is arranged in a bi-layer, makes up the structure of the plasma layer. The hydrophilic segment of a plasma membrane is its head, and it has a high affinity towards the water. The hydrophilic heads of phospholipids in a layer bi layer faces outward, reaching the (watery) liquid both inside and outside the cell.
The hydrophobic, or "water-dreading" portion of a phospholipid comprises of its long, non polar unsaturated fat tails. The unsaturated fat tails can be without much of a stretch communicate with other non polar atoms, yet they cooperate inadequately with water.
