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Unformatted text preview: Exam 2 BCHS 3305 Spring 2010 ID Name _______________________ There are 25 multiple choice (p1-5) and 6 short answer (p6-9) questions. Answer all questions. Multiple choice: answer all 25. 2 pts each. Total 50 pts 1. What is the net change in the number of protons across the mitochondrial membrane for each set of two electrons transferred through Complexes I, III, and IV, respectively? A. 2; 4; 4 B. 4; 4; 2 C. 3; 3; 4 D. 4; 2; 4 E. none of the above 2. The specific energy source for the ATP synthesis in thylakoid membranes is: A. movement of electrons between photosystem II and photosystem I. B. oxidation of water C. oxidation of NADPH D. absorption of photons by chloroplast pigments E. higher concentration of H + inside versus outside the thylakoid membranes 3. If cyanide is used to block electron transport, what complex is inhibited? A. Cytochrome c oxidase (Complex IV). B. NADH ubiquinone reductase (Complex I) C. Ubiquinol cytochrome c reductase (Complex III) D. Succinate-ubiquinone reductase (Complex II) E. ATP synthase (Complex V). 4. An uncoupler: A. prevents the transport of protons from the interior of the mitochondria to the exterior. B. prevents the transport of protons from the exterior of the mitochondria to the interior. C. facilitates the transport of protons from the interior of the mitochondria to the exterior, breaking down the proton gradient. D. facilitates the transport of protons from the exterior of the mitochondria to the interior, breaking down the proton gradient. E. none of the above 1 Exam 2 BCHS 3305 Spring 2010 5. What is the net reaction catalyzed by the process of photosynthesis? A. CO 2 + 2H 2 CH 2 O + H 2 O B. CH 2 O + O 2 CO 2 + H 2 O C. CO 2 + H 2 O H 2 CO 3 D. CO 2 + H 2 O CH 2 O + O 2 E. CH 2 O + O 2 CO 2 + H 2 O 6. Which of the following compounds can freely pass through the inner mitochondrial membrane? A. H + B. CO 2 C. acetate D. ATP E. Glucose 7. Where do the dark reactions in photosynthesis take place? A. stromal lamellae B. granal lamellae C. stroma D. granum E. thylakoid lumen 8. The wide variety of accessory pigments in photosynthetic membranes A. increases membrane permeability to ions. B. stabilizes the structure of the membrane. C. allows them to strongly absorb violet light. D. broadens the range of wavelengths of light that can be absorbed. E. allows them to strongly absorb red light. 9. The reactions catalyzed by Rubisco can be summarized schematically as A. C 6 + 3 C 3 3 C 5 B. 3 C 5 C 3 + 2 C 6 C. CO 2 + C 5 2 C 3 D. C 6 2 C 2 + CO 2 E. none of the above 10. What chemical reaction is catalyzed by catalase?...
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This note was uploaded on 09/15/2010 for the course BCHS 3305 taught by Professor Fujita during the Spring '10 term at University of Houston.
- Spring '10