+20 Questions on Osmosis
20 multiple choice questions on Osmosis, followed by the answer key.
Multiple Choice Questions: Osmosis
1. What is osmosis?
A) Movement of water from low to high concentration
B) Movement of water from high to low solute concentration
C) Movement of water through a semi-permeable membrane from high to low water concentration
D) Active transport of solutes
2. Osmosis is a type of:
A) Active transport
B) Passive transport
C) Endocytosis
D) Facilitated diffusion
3. Which of the following best describes osmosis?
A) Movement of solute through a membrane
B) Diffusion of gases
C) Movement of water across a selectively permeable membrane
D) Movement of proteins across a membrane
4. In osmosis, water moves from:
A) Higher water potential to lower water potential
B) Lower water potential to higher water potential
C) High solute to low solute concentration
D) Low solute to high solute concentration
5. A solution with higher solute concentration than the cell is called:
A) Hypotonic
B) Hypertonic
C) Isotonic
D) Saturated
6. What happens to a cell placed in a hypertonic solution?
A) Gains water and bursts
B) No change occurs
C) Loses water and shrinks
D) Becomes turgid
7. What is the result of placing an animal cell in a hypotonic solution?
A) Cell shrinks
B) Cell remains unchanged
C) Cell bursts (lysis)
D) Cell forms a wall
8. Which organelle in plant cells helps resist bursting in hypotonic solutions?
A) Nucleus
B) Cell wall
C) Mitochondria
D) Chloroplast
9. An isotonic solution causes a cell to:
A) Swell
B) Shrink
C) Remain the same
D) Divide
10. Which term describes the pressure exerted by water in plant cells against the cell wall?
A) Osmotic pressure
B) Turgor pressure
C) Hydrostatic pressure
D) Atmospheric pressure
11. Which of the following is NOT a requirement for osmosis to occur?
A) Solute
B) Water
C) Energy
D) Semipermeable membrane
12. In osmosis, which molecule moves?
A) Glucose
B) Water
C) Salt
D) Oxygen
13. Which condition would cause water to enter a cell by osmosis?
A) The cell is in a hypertonic solution
B) The cell is in an isotonic solution
C) The cell is in a hypotonic solution
D) The membrane is impermeable
14. Why is osmosis important to cells?
A) It provides energy
B) It maintains water balance
C) It helps in protein synthesis
D) It digests food
15. Which situation describes osmosis correctly?
A) Salt moves from high to low concentration
B) Water moves into a dehydrated cell
C) Glucose enters through protein channels
D) Oxygen diffuses into a cell
16. If a plant cell loses too much water, it becomes:
A) Turgid
B) Lytic
C) Plasmolyzed
D) Isotonic
17. What happens to the net movement of water when equilibrium is reached?
A) Water stops moving
B) Water moves only inward
C) Water moves only outward
D) Water moves equally in both directions
18. Which solution has the same solute concentration as the cell?
A) Hypertonic
B) Hypotonic
C) Isotonic
D) Concentrated
19. Which cell type is more likely to burst in a hypotonic environment?
A) Plant cell
B) Bacterial cell
C) Animal cell
D) Fungal cell
20. Osmosis contributes to which process in plants?
A) Seed dispersal
B) Photosynthesis
C) Nutrient transport
D) Water uptake by roots
- Questions on Diffusion, with answers
- Questions on Parts of the Cell
- Questions on Prokaryotic and Eukaryotic Cells
Answer Key
1. C) Movement of water through a semi-permeable membrane from high to low water concentration
2. B) Passive transport
3. C) Movement of water across a selectively permeable membrane
4. A) Higher water potential to lower water potential
5. B) Hypertonic
6. C) Loses water and shrinks
7. C) Cell bursts (lysis)
8. B) Cell wall
9. C) Remain the same
10. B) Turgor pressure
11. C) Energy
12. B) Water
13. C) The cell is in a hypotonic solution
14. B) It maintains water balance
15. B) Water moves into a dehydrated cell
16. C) Plasmolyzed
17. D) Water moves equally in both directions
18. C) Isotonic
19. C) Animal cell
20. D) Water uptake by roots
Dive into the groundbreaking science of neurotransmitters—your brain’s invisible architects—in Chemical Harmony: How Neurotransmitters Shape Our Lives (2025). This meticulously researched book reveals how serotonin, dopamine, GABA, and other brain chemicals silently orchestrate every aspect of your existence, from decision-making and relationships to mental health and emotional resilience.Click here to buy
👉 +3000 Biology Questions with Answers Key.
Share Online!
