What property makes phospholipids ideal building blocks for cell membranes? They have hydrophilic heads and tails.

They have hydrophilic heads and hydrophobic tails.

They have hydrophobic heads and hydrophilic tails.

They have hydrophobic heads and tails.

They have hydrophilic heads and hydrophobic tails.

Explanation:

Phospholipid membranes are comprised of a chain of lipids. These typically are arranged in a bilayer; the hydrophilic lipid heads are polar, and face outwards, while the hydrophobic tails are polar facing inwards.

The membranes are selectively permeable, and only allow the movement of small, non-polar molecules through the bilayer.