Midterm_2010_B_answer

Midterm_2010_B_answer - Chem/Biochem 114B Mid-Term 2010...

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Chem/Biochem 114B Mid-Term 2010 Last Name, First Name Student ID Section Number Page 1 Ch e m / Bio c h e m 114B Midt e rm Exam February 5, 2010 Exam Version ‘ B ’ — Mark in ‘Test Form’ on Scantron Writ e your nam e and s tud e nt ID on E V ERY pag e of th e e xam Fill in th e bubbl e s for your s tud e nt ID on th e s c antron . R e pla ce th e alphab e ti c al l e tt e r in your student ID with the number ‘1’ (e.g., A = 1, U = 1) Questions 1-25 Multiple Choice 75 points Questions 26-31 Short Answer 36 points 111 points
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Chem/Biochem 114B Mid-Term 2010 Last Name, First Name Student ID Section Number Page 2 Qu e s tion s 1-25 (3 pt s . e a c h): Multipl e c hoi ce 1. (3pts.) Photosynthesis takes place in the _______. A) Mitochondria B) Stroma C) Matrix D) Thylakoids E) Cristae Answer: D 2. How many electrons are transferred to plastoquinones (Q) by the oxygen evolving center of photosystem II (PSII) per oxygen molecule that is generated during photosynthesis? A) 0 B) 1 C) 2 D) 4 E) 8 Answer: D 3. Please fill in the blank. _________ is the final electron acceptor of the cytochrome bf system responsible for the transfer of electrons from PSII to PSI. A) Ferridoxin. B) Chlorophyll. C) FAD. D) P700. E) Plastocyanin. Answer: E 4. During non-cyclic photosynthesis, the normal photosynthetic pathway for plants and cyanobacteria, how many protons are used for ATP synthesis by the proton pump? A) 1 B) 2 C) 4 D) 8 E) 12 Answer: E 5. What is the overall efficiency of converting light into energy by non-cyclic photosynthesis? A) 1 photon/ATP
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Chem/Biochem 114B Mid-Term 2010 Last Name, First Name Student ID Section Number Page 3 B) 2 photons/ATP C) 3 photons/ATP D) 4 photons/ATP E) 8 photons/ATP Answer:A 6. (3pts) In proteins these amino acid residues usually complex to the iron-sulfur clusters. A) Gly B) Arg C) Cys D) All of the above E) None of the above Answer: C 7. (3pts.) Electron flow down the electron-transport chain leads to the A) transport of protons across the inner mitochondrial membrane from inside the matrix to the intermembrane space. B) transport of protons across the inner mitochondrial membrane from the intermembrane space into the matrix. C) coupled synthesis of GTP. D)
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Midterm_2010_B_answer - Chem/Biochem 114B Mid-Term 2010...

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