JAMB Biology 2025 Objective — Question 40
Question 40 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2025 Objective paper, with the correct answer and a full explanation.
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Which of the following describes the function of the plasma membrane in a cell?
- A. It controls the cell's genetic material
- B. It stores energy in the form of ATP
- C. It regulates the movement of substances in and out of the cellCorrect
- D. It produces proteins for the cell
Explanation
The plasma membrane serves as a selective barrier that controls the movement of substances into and out of the cell. It is composed of a phospholipid bi-layer with embedded proteins that allow the cell to maintain homeostasis by regulating the passage of ions, nutrients and waste products.
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