In biological membranes, the phospholipids are arranged in a
A) single layer, with the phosphorus-containing region facing the interior of the cell.
B) bilayer, with the fatty acids pointing toward one another.
C) bilayer, with the fatty acids facing outward (facing the interior and exterior of the cell).
D) bilayer, with the phosphorus groups in the interior of the membrane.
E) single layer, with the fatty acids facing the interior of the cell.

Question

Quizplus · Accepted Answer

Phospholipids in biological membranes are arranged in a bilayer, with the hydrophobic fatty acid tails pointing toward each other in the interior of the bilayer, and the hydrophilic phosphate heads facing the aqueous environments on either side of the membrane. This arrangement is crucial for the membrane's function in controlling the passage of substances in and out of the cell.

In Biological Membranes, the Phospholipids Are Arranged in a