Question 1: Which process allows water to move across cell membranes?

Answer: Osmosis

Question 2: True or false: Diffusion requires energy from the cell.

Answer: False

Question 3: Match the following terms to their definitions:

Answer: See full answer key

Question 4: Fill in the blank: During osmosis, water moves towards a region of higher ______ concentration.

Answer: solute

Question 5: Order the following steps in the process of diffusion:

Answer: See full answer key

Question 6: Explain why osmosis is important for plant cells.

Answer: Osmosis helps maintain cell turgor pressure, which keeps the plant upright.

Question 7: Calculate the concentration gradient given the following concentrations: 5% inside the cell and 10% outside the cell.

Answer: 5%

Question 8: Describe the difference between osmosis and diffusion.

Answer: Osmosis is the movement of water across a semipermeable membrane, whereas diffusion involves other molecules moving from high to low concentration.

Question 9: True or false: Osmosis can occur in both directions across a membrane.

Answer: True

Question 10: Why might a cell use active transport instead of diffusion?

Answer: A cell uses active transport to move substances against a concentration gradient, which requires energy.

Question 11: Discuss how temperature might affect the rate of diffusion.

Answer: Increased temperature increases the kinetic energy of particles, leading to faster movement and an increased rate of diffusion. Conversely, lower temperatures slow down particle movement, decreasing the rate of diffusion.