Biol 337: Section 2 HW 1 1. What is the difference between a passive and an active process? (1 point) 2. How does diffusion move molecules in a solution (relate your answer to the concentration gradient)? (1 point) 3. How are diffusion and osmosis related? (1 point) 4. A balloon filled with an aqueous solution containing solute A, where the membrane is permeable to water but not solute A, is submerged into a tank of pure water (no solute). What will happen and why? (1 point) 5. 0.5 L of an aqueous solution contains 0.25 moles of NaCl. What is the molarity of NaCI in this solution? What is the osmolarity of the solution? (2 points) 6. 1 L of an aqueous solution contains 0.5 moles of MgCl2 and 0.5 moles of protein a. What is the molarity of MgCl2? What is the molarity of protein a? What is the osmolarity of the solution? (3 points) 7. What is the tonicity of the solution in question 8 to the solution in question 9? (1 point) 8. What is the tonicity of the solution in question 9 to the solution in question 8? (1 point) 9. Is facilitated transport an active or passive process? Why is this facilitation needed? (2 points) 10. What is the difference between active transport and diffusion as regards to the concentration gradient? (1 point) 11. Is osmosis a passive or active process? (1 point)