What is the arrangement of the phospholipids as a substance passes through the plasma membrane?
A) phospholipid head, phospholipid tails, phospholipid head, phospholipid tails
B) phospholipid head, phospholipid head, phospholipid tails, phospholipid tails
C) phospholipid head, phospholipid tails, phospholipid tails, phospholipid head
D) phospholipid tail, phospholipid head, phospholipid tail
E) phospholipid tails, phospholipid head, phospholipid head, phospholipid tails

Question

Quizplus · Accepted Answer

The arrangement of the phospholipids in the plasma membrane is a phospholipid bilayer, which means that there are two layers of phospholipids with the hydrophilic head facing outward and the hydrophobic tails facing inward towards each other. Therefore, the correct arrangement of the phospholipids is phospholipid head, phospholipid tails, phospholipid tails, phospholipid head. This arrangement forms a barrier to the free movement of substances across the membrane, allowing only certain molecules to pass through via protein channels or transporters. Choice C is the only option that matches this arrangement.

What Is the Arrangement of the Phospholipids as a Substance