Bios%20100%20Spring%202010%20Exam%202

Bios%20100%20Spring%202010%20Exam%202 - Bios 100 Spring...

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Bios 100 Spring 2010 Exam 2 1. What distinguishes facilitated diffusion from simple diffusion? A. Membrane proteins help move molecules across the membrane. B. Water moves through membranes by facilitated diffusion C. No energy is used to move molecules across the membrane. D. Molecules move from a region of higher concentration to a region of lower concentration. E. Facilitated diffusion directly uses the power of ATP whereas simple diffusion does not. 2. Which of the following transporters does not use passive transport to move molecules across a membrane? A. GLUT-1 glucose transporter B. Sodium–potassium pump C. Gramicidin ion channel D. Valinomycin E. Ribomycin 3. Lactose transport by membrane proteins occurs under conditions in which the concentration of lactose inside the cell is higher than the concentration outside the cell. What type of transport is used to move lactose into the cell? A. Active transport B. Simple diffusion C. Facilitated diffusion D. Osmosis E. Phagocytosis 4. Which molecule is initially metabolized in a cell to produce energy for performing work? A. Phosphate B. ADP C. ATP D. NADH E. Glucose 5. Which process is not part of the cellular respiration pathway that produces large amounts of ATP in a cell? A. Fermentation B. Electron transport chain C. Krebs cycle D. Glycolysis E. They are all part of the cellular respiration pathway that produces large amounts of ATP in a cell
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6. The reactions that directly generate the largest amounts of ATP during cellular respiration take place in the A. plasma membrane B. cytoplasm C. mitochondrial matrix D. membrane of the cristae E. thylakoid 7. Into which molecule are all the carbon atoms in glucose ultimately incorporated during cellular respiration? A. Water B. Carbon dioxide C. ATP D. NADH E. Protons 8. Which of the following statements about the electron transport chain is true? A. NADH and FADH 2 donate their electrons to the chain. B. Water is the last electron acceptor. C. Electrons gain energy as they move down the chain. D. The electron transport chain is the first step in cellular respiration. E. The final product of the electron transport chain is lactic acid. 9. Which stage of glucose metabolism produces the most ATP? A. Krebs cycle B. Fermentation of pyruvate to lactate C. Glycolysis D. Electron transport chain E. Calvin cycle 10. Which of the following statements is true of the bonds in a water molecule? A. Oxygen acts as the electron acceptor and is oxidized. B. There is equal sharing of the electrons between the oxygen atom and the two hydrogen atoms, and the net charge is zero. C. The electron in each hydrogen atom is completely transferred to the oxygen atom, and each hydrogen atom has a net charge of +1. D. Oxygen holds electrons more tightly than hydrogen does, and the net charge
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This note was uploaded on 03/06/2011 for the course BIOS 101 taught by Professor Molumby during the Spring '08 term at Ill. Chicago.

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Bios%20100%20Spring%202010%20Exam%202 - Bios 100 Spring...

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