Question

Cell membranes contain a central bilayer formed by A) lipids B) protein pumps C) carbohydrates D) proteins

Answer 1

Answer: The correct answer is A) Lipids.

Cell membrane is present around the cytoplasm of all cells of the living organisms, which separates the interior of the cell from its external environment. It is primarily made up of two layer of phospholipids, therefore called phospho-lipid bilayer. Thus, the central bilayer is formed by the lipids in the cell membrane.

It is a selectively permeable membrane. This means that it regulates the transport of substances in and outside the cell.

Thus, option A) Lipids is the right answer.

Answer 2

The answer is A Lipids

This lipids surrounded the cytoplasm of cells which help the cell to control the substances that goes in and out of the cell to protect a harmful substance to potentially enter the cell

hope this helps