Question

1

Previous
The cell membrane contains "doors" that allow materials to move from one side of
the membrane to the other. What are these doors made of?
A lipids
B proteins
C carbohydrates
D water pockets
А
ADC

Answer 1

The 'doors' in the cell membrane are made of proteins called transport proteins or channels.

Step-by-step explanation:

The 'doors' in the cell membrane that allow materials to move from one side to the other are made of proteins. These proteins are called transport proteins or channels. They are integral membrane proteins that form pores or channels through which specific substances like ions or molecules can pass.

Learn more about Cell membrane structure and function