Homework Set 2 Name: 1. Draw a eukaryotic cell including 5 organelles or cell components – label each organelle/component and give one unique structural feature and one main function for each 2. Draw a membrane bilayer with an example of a) simple diffusion, b) facilitated diffusion, and c) active transport. For each type of transport: indicate what molecule solute is being transported (give an actual molecule that would be appropriate for that type of transport), indicate the relative solute concentration on each side of the cell membrane as it would appear before transport, and indicate the direction of solute transport. 3. The internal solute concentration of a red blood cell is about 2%. For each of the solutions below indicate whether it would be a hypotonic or hypertonic solution and explain what would likely happen to a blood cell if it were placed in each solution (use complete sentences and include the net movement of water in your answer) a. 0.5% Solute Solution b. 5% Solute Solution 4. Give an example of a spontaneous and an example of a non-spontaneous process or reaction from Chapters 2-7 (including what section or figure or slide the example is found). Provide one reason that the reaction is spontaneous or non-spontaneous (use complete sentences). 5. Using the illustration of oxidative phosphorylation below a) Label the places where NADH and FADH2 each donate their electrons to the electron transport chain. b) Show the path of electrons from their entry point to their final destination. c) What is the final electron acceptor? Label the final electron acceptor and the product it produces. d) Use arrows to indicate where protons (H+) are pumped across the membrane and the direction of movement of the protons. Label which side of the membrane is the area of high proton (H*) concentration and the area of low proton (H*) concentration. e) Use an arrow to indicate where protons (H+) re-cross the membrane down their concentration gradient h) What is the reaction that of proton (H+) flow from the area of high concentration to the area of low concentration provides energy for? Label the reactants and products for this reaction. Matrix ATP Synthase IV Intermembrane Space Du nofs Cyt C and what molecule is being Would this reaction, as written, be part of the citric acid cycle of cell respiration or 6. In the reaction below, what molecule is being oxidized reduced Calvin cycle of photosynthesis CH,O HOCH NADPH NADP+ U CH,O-P HOCH + P₁ CH 1,3-bisphospho- glycerate glyceraldehyde-3-phosphate (G3P) 7. The molecules O2 and CO2 are directly involved in both cell respiration and photosynthesis. In what stage of cellular respiration (glycolysis, citric acid cycle, oxidative phosphorylation) or photosynthesis (light reactions, Calvin cycle) are each being used or produced and describe what role they play in each situation. 02 Produced Used Role: Role: CO2 Produced Role: Used Role: 8. The following statements are all false. Pretend you have a friend that believes they are true - Write an explanation for why each is false to convince your friend of the correct answer (this has to be more than just stating the correct answer - explain where your friend is mistaken and provide reasoning for the correct answer; use complete sentences) Plants produce ATP by photosynthesis so they don't need to do cellular respiration Exergonic reactions (- AG) go from more stable, higher energy molecules to less stable, lower energy molecules Yeast cells in the absence of oxygen will stop doing glycolysis and do fermentation instead