Biology CLEP Prep Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Are you gearing up for the Biology CLEP exam? Prepare like a pro with our Biology CLEP Prep Practice Exam!

Start Multiple Choice Practice Test
Start Flash Cards

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the main function of cell membranes?

  1. Regulating what enters and leaves the cell

  2. Holding genetic information

  3. Providing energy for metabolic reactions

  4. Modifying proteins

The correct answer is: 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.

More Questions Like This