Which of the following describes how phospholipids are positioned in the double layer cell membrane?

Question

a
hydrophobic phosphate heads face into each other inside the cell membrane
b
hydrophilic phosphate heads face inside and outside the cell
c
the phospholipids lie end to end phosphate head to fatty acid tail
d
hydrophobic fatty acid tails face inside and outside the cell

Answer 1

The correct answer is:

b hydrophilic phosphate heads face inside and outside the cell.

In a phospholipid bilayer, the hydrophilic (water-attracting) phosphate heads face outward towards the aqueous environment inside and outside of the cell, while the hydrophobic (water-repelling) fatty acid tails face inward, away from water.