Question

Which statements about the cell membrane are true?

A) The cell membrane is impermeable to all substances
B) Phospholipids form a continuous, rigid structure in the membrane
C) Proteins play a role in transport and communication across the membrane
D) The cell membrane is composed of a single layer of molecules

Answer 1

The cell membrane is selectively permeable and composed of a lipid bilayer made up of phospholipids. Proteins are involved in transport and communication across the membrane. The cell membrane is not a single layer of molecules.

Step-by-step explanation:

The cell membrane is composed of a lipid bilayer, primarily made up of phospholipids. This structure causes the membrane to be selectively permeable, allowing only certain substances to pass through.

Proteins play a vital role in transport and communication across the membrane. The cell membrane is not composed of a single layer of molecules; it is made up of a double layer of phospholipids.