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Unformatted text preview: syed (sms3768) HW8 sathasivan (48475) 1 This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points How do you detect that certain photosyn- thetic organisms live in nature without having photosystem II? 1. by testing for production of either sucrose or starch 2. through experiments to generate an ac- tion spectrum 3. by testing for liberation of O 2 in the light correct 4. by determining if they have thylakoids in the chloroplasts 5. by testing for CO 2 fixation in the dark Explanation: That certain photosynthetic organisms live in nature without having Photosystem II can be tested by determining whether they release O 2 in the light. 002 10.0 points Suppose a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following proceeses? 1. the reduction of NADP + 2. the absorption of light energy by chloro- phyll 3. the splitting of water 4. the synthesis of ATP due to chemiosmosis correct 5. the flow of electrons from photosystem II to photsystem I Explanation: Higher concentration of protons inside thy- lakoid relative to low proton concentration in stroma, is essential for chemiosmosis and ATP synthesis during photophosphorylation. Once this proton concentration gradient disappears ATP synthesis will stop. 003 10.0 points Which of I) ATP II) NADPH III) glucose is produced as a result of cyclic electron flow in the chloroplast? 1. II only 2. I, II and III 3. I and II only 4. I only correct 5. III only Explanation: Only ATP is produced in the chloroplasts as a result of cyclic electron flow....
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This note was uploaded on 05/02/2011 for the course BIOLOGY 311C taught by Professor Sathasivan during the Fall '10 term at University of Texas at Austin.
- Fall '10