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sample-exam-2 - 1 Name(last first 3130 102 University of...

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Unformatted text preview: 1 Name (last, first) : 3130 102 University of California, San Diego, Dr. Lukas Buehler Summer 06 Midterm 2 (100 POINTS) YOUR SCORE: ( “2 POINTS, YOUR GRADE All Students please read the following waiver: By Signing this waiver. I give permission for this exam to be left for me to pick up at York Hall 3080. If! do not sign this waiver, I acknowledge that my exam will be available for pickup during office hours or class. / Signature Date PLEASE READ THE QUESTIONS CAREFULLY BEFORE ANSWERING! € 1. Name the enzymes that form high energy compounds in the Krebs cycle. I amp; hemM MytZJXAA/(ZJ Neda-3M WC?) WWW out jflmretQ) WM (WC? and; Ca”; WW’LWO 2. Name the cofactors involved in the transfer of reducing equivalents in pyruvate dehydrogenase complexes E2 and E3. Indicate if they are prosthetic groups or diffusible coenzymes @ (m UDU‘R— 61M Zl/t Goat/wilt) W/Lcrcg (a) r—wm) C9 WDCQ V’l—D( if) , ® .4 Wadi/(Ca 3. Complex ll in the electron transport chain is also a Krebs cycle enzyme. What is its name in megs cyce' S/MCQM-et— M7finfix’WG/. Name the product formed by this enzyme that (a) will be used by the next Krebs cycle enzyme and (b) by the next ETC complex. (4,) MJ:@ (5) am. 6’9 __'—___._____—__.—._..__—...._———-—-———-— 4. What is the consequence of alternating cofactors that accept only electrons (eg. FeS complexes, cytochromes) with those that bind reducing equivalents (eg. FMN, 0H2) along the electron tra chain and how is this important for ATP synthesis? / 2 Name (last, first) : _ / 5. In the presence of excess pyruvate but low energy charge. some of the pyruvates can be used to ' increase the capacity of the Krebs cycle. Describe this mechanism. C? pyNd‘A Ms LL MbL/t‘f/f (*0 lViL‘C’éU/w 6:) 11er GAY/ff (—2) 0M- Mad/‘0 WAWGZI/Mfrfl +7591 6. Photosynthesis In plants can switch from a linear to a cyclic mode. Which mode makes NADPH and ATP which mode can make only ATP? Which mode Is in ependent of water as agelectron source? Wm am "pm WV A W M awflTFD/“nAXMKW/Lizflmar Col/t7 Mot “J 7. What is the mechanism and purpose of uncoupling ATP synthesis from the electron transport III N" 4 3 Name (last, first) : 8. Why can the Krebs cycle run in the reverse in some photosynthetic microorganism. but not in mitochondria? What metabolite allows its reversal and which Krebs cycle enzyme is the critical What is the metabolic net gain (metabolite) of this reducti arboxylate cycle? ...
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sample-exam-2 - 1 Name(last first 3130 102 University of...

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