- A Active transport of ions across the plasma membrane
- B Entry of water into vacuole by osmosis
- C Cell wall rigidity resisting outward expansion
- D ATP hydrolysis powering membrane pumps
Correct answer: B. Entry of water into vacuole by osmosis
Explanation: Water enters the vacuole by osmosis, pushing the cell membrane against the rigid cell wall. This creates turgor pressure.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.