Ace the Biology CLEP 2026 – Get Prepped to Conquer Science!

Question: 1 / 400

What is the main function of cell membranes?

Regulating what enters and leaves the cell

Cell membranes serve as a selective barrier that regulates the movement of substances in and out of the cell. This function is essential for maintaining a stable internal environment and ensuring essential molecules enter the cell while harmful substances are kept out. Option B is incorrect because genetic information is stored in the nucleus, not the cell membrane. Option C is incorrect because energy production occurs in specific organelles, not the cell membrane. Option D is incorrect as protein modification occurs in the endoplasmic reticulum and Golgi apparatus, not the cell membrane.

Get further explanation with Examzify DeepDiveBeta

Holding genetic information

Providing energy for metabolic reactions

Modifying proteins

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy