Question

this is an image of the phospholipid bilayer. whats the name of the part of the phospholipid thats between the layers, labeled 2 in the image?
a) hydrophilic head
b) atp
c) hydrophobic tail
d) sodium - potassium pump

Explanation:

In a phospholipid bilayer, phospholipids have a hydrophilic (water - attracting) head and hydrophobic (water - repelling) tails. The part between the layers (the interior of the bilayer) is made up of the hydrophobic tails as they avoid water. Option A is the hydrophilic head which is on the outside (interacting with water - based environments), option B (ATP) is an energy - carrying molecule not part of the phospholipid structure, and option D (sodium - potassium pump) is a membrane protein, not part of the phospholipid. So the part labeled 2 (between the layers) is the hydrophobic tail.

Answer:

C) Hydrophobic tail