Question

Which of the following statements are true about cell membranes?

a) Cell membranes are composed of a single layer of proteins.
b) Cell membranes are selectively permeable.
c) Cell membranes are rigid structures that do not allow for flexibility.
d) Cell membranes are only found in plant cells.

Answer 1

Cell membranes are selectively permeable and composed of a double layer of phospholipids embedded with proteins.

Step-by-step explanation:

The cell membrane is selectively permeable, meaning only some molecules can get through. It is composed of a double layer of phospholipids embedded with proteins. The phospholipids have a hydrophilic head and a hydrophobic tail, which allows the membrane to be both flexible and selectively permeable.