6.What is true about electric potential and electrolytic cells? A.Electrolytic cells depend on an outside source of electricity to cause electrons to flow in the opposite direction.   B.Electrolytic cells use the chemical energy from spontaneous redox reactions to generate electrical energy.    C.All electrochemical cells have a positive electric potential; therefore, electrolytic cells also have positive electric potentials.   D.The electric potential of an electrolytic cell may be negative or positive, depending on the electrodes.

1. Water movement across a semipermeable membrane and between compartments with differing water activity will occur until acitviites of water in the two compartments become equal. TRUE OR FALSE 2. When there is a difference in water activity between two compartments seperated by a semipermeable membrane. There is net water movement from the compartment with the higher water activity to that with lower water activity TRUE OR FALSE 3. Osmosis requires an attractive force between water and the solute? TRUE OR FALSE

9. Potassium cyanide is known to interfere with the formation and use of ATP in cell metabolism. If the use of potassium cyanide resulted in a decelerated entry of a solute into a cell, it may be reasonably assumed that, under normal circumstances, the solute enters by A. Active transport B. Osmosis C. Simple diffusion D. Receptor-mediated endocytosis 10. Which statement is TRUE for cellulose, but NOT TRUE for protein? A. It is found in cell surface membranes. B. It is synthesised from identical subunits. C. It is used as an energy source. D. It may be a structural component.

If the fluid inside a cell has a 1.5% solute concentration, which of the following solution(s) would be considered HYPOTONIC? SELECT ALL THAT APPY    A. A solution with 3.4% calcium phosphate concentration B. A solution with 1.4% glucose concentration C. A solution with 2.5% potassium chloride concentration D. A solution with 0.5% sodium chloride concentration\

10)You observe a cell in a solution swelling until it bursts. You have seen an instance of osmosis in Select one: a. a hypertonic solution. b. an isotonic solution. c. a hypotonic solution. d. an exotonic solution.

4.

What type of energy helps drive the passive processes of diffusion, osmosis, and facilitated diffusion? (Pick ALL correct statements involved with this.) In other words what are all the TRUE statements regarding these processes? Select one or more: a.random motion which increases when temperature increases b.ATP energy c.random motion which increases when molecules have large molecular weight d.random motion which increases when molecules concentration decreases e.random motion which increases when molecules concentration increases f.random motion which decreases when temperature decreases g.random motion which increases when molecules have low molecular weight

9. The mean osmolality of red blood cells (RBC) is 294 mOsm/kgH₂O. Which of the solutions listed below is an example of a hypotonic solution for RBCs? A. 300 mM sucrose in H₂O B. 350 mM trehalose in H₂O C. 73 mM FeCl3 in H₂O D. 73 mM NaCl in H₂O E. 147 mM NaCl in H₂O

2. Suppose you had allowed your dialysis experiment to continue for several days (with the beaker covered to prevent evaporation). At the end of that time period, you cut open the dialysis bag and pour the contents of the sausage into a clean beaker. If you were to test that sausage solution, what would you expect to be present in it? Why? C. OSMOSIS WITH AN ARTIFICIAL MEMBRANE b. a. Procedure For this experiment you will be making three more dialysis tubing sausages. This time fill all three sausages with 10 ml of a 10 percent sucrose solution. After you tie off each sausage, remember to trim off any excess floss and tubing and to rinse the sausage in tap water and pat it dry with a paper towel. Now, weigh each sausage using a triple beam balance and record the weights in the Results section below. Be su to keep track of which weight corresponds to which sausage. Place the first 100 ml labeled beaker filled with distilled water. Place the second sausage in a 100 ml sausage in labeled…

What is the independent variable of the experiment?