The cell membrane is composed of a macromolecule that also provides insulation and stores energy. It also has a special arrangement. Which answer choice best describes the cell membrane's composition and arrangement?

Question

Responses

Ring-shaped monosaccharide
Ring-shaped monosaccharide

Protein trilayer
Protein trilayer

Phospholipid bilayer
Phospholipid bilayer

Double-helix DNA

Answer 1

The answer choice that best describes the cell membrane's composition and arrangement is Phospholipid bilayer.

The cell membrane is primarily made up of phospholipids arranged in a bilayer formation. This structure allows for the hydrophilic (water-attracting) heads to face outward towards the aqueous environment, with the hydrophobic (water-repelling) tails facing inward, away from water. The membrane also contains proteins, cholesterol, and carbohydrates, contributing to its role in insulation and energy storage, but the fundamental arrangement is the phospholipid bilayer.