AP BIOLOGY

Detailed explanation-1: -Both prokaryotic and eukaryotic cells have a plasma membrane, a double layer of lipids that separates the cell interior from the outside environment. This double layer consists largely of specialized lipids called phospholipids.

Detailed explanation-2: -The core of nearly all cell membranes is a double-layered sheet called a phospholipid bilayer.

Detailed explanation-3: -The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells.

Detailed explanation-4: -Cell Membranes made of phospholipid bilayer providing a flexible structure that forms a barrier between the cell and its surroundings.

Detailed explanation-5: -Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly.