A hypothetical "microbullet" shot through a phospholipid bilayer will pass the bilayer components in which order?
A) tail → tail → head → head
B) head → tail → tail → head
C) head → tail → head → tail
D) head → head → tail → tail
E) tail → head → tail → head

Question

Quizplus · Accepted Answer

The phospholipid bilayer is structured with the hydrophilic (water-attracting) heads facing outward towards the water on both sides, and the hydrophobic (water-repelling) tails facing inward, away from the water. Thus, a microbullet passing through would first encounter a head, then the tails in the middle, and finally another head as it exits.

A Hypothetical "Microbullet" Shot Through a Phospholipid Bilayer Will Pass