Question

Which of the following is the primary function of the cell membrane?

• A. Providing structural support
• B. Storing genetic information
• C. Synthesising proteins
• D. Regulating the passage of substances in and out of the cell

Answer 1

Answer:

D. Regulating the passage of substances in and out of the cell

The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products Cell membrane, thin membrane that surrounds every living cell, delimiting the cell from the environment around it. Enclosed by this cell membrane (also known as the plasma membrane) are the cell’s constituents, often large, water-soluble, highly charged molecules such as proteins, nucleic acids, carbohydrates, and substances involved in cellular metabolism