midterm2w04blankandkey

midterm2w04blankandkey - Winter 2004 BIS103-002 MIDTERM 2...

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Unformatted text preview: Winter 2004 BIS103-002 MIDTERM 2 March 4, 2004 page 1 Student ID # _______________________________________ Check the appropriate boxes below Undergraduate Graduate Audit Completing Incomplete Note: There are 7 questions and a total of 9 numbered pages counting the cover sheet. A blank sheet is included in the back for scratch paper and to cover your exam. Do not use this paper for your answers. If you need more room use the back of the numbered pages. Partial credit will be given. WRITE YOUR NAME ON THE TOP OF EACH PAGE. Question Value Score 1 20 2 18 3 12 4 10 5 20 6 8 7 12 TOTAL 100 T= 298 K R= 8.315 J x mol-1 x K-1 Faraday's constant (F) is 96.5kJ x volt-1 x mol -1 G o ' for the reaction ADP + P i ATP + H 2 O = + 30.5 kJ x mole -1 G o ' = - n F E o ' G = G o ' + RT ln [products/reactants] I, ______________________________, authorize the University to distribute publicly this graded exam ( e.g. , handed out in class, or left in a bin for me to pick up). Signature ________________________________________ Date _____________________ Winter 2004 BIS103-002 MIDTERM 2 March 4, 2004 page 2 1. (20 pts). How many net ATPs are produced when the following compound is oxidized via glycolysis, (beta) oxidation, and the TCA (Krebs) cycle in a bacterium? Assume an equivalent number of carbons are oxidized to CO 2 . You must name the biochemical pathway that is a source (directly or indirectly) for ATP. For full credit you must show your calculations. Write your final answer on the line provided. Partial credit will be given. O CH 2 OC H CH 2 OC C O H 2 C O O CH 3 C O H 3 C CH 3 Net ATP yield ____________________ Winter 2004 BIS103-002 MIDTERM 2 March 4, 2004 page 3 2. (18 pts) Very Short Answer (a). ( 6 pts) Draw the structures of the products of the reaction catalyzed by transketolase using the substrates shown below: (b). (6 pts). Cytochrome c and coenzyme Q (=ubiquinone, CoQ) are both electron carriers of the electron transport chain. Name two distinct functional differences between the two (do NOT write that they are different structures). 1.____________________________________________________________________________________ 2____________________________________________________________________________________ (c). (6 pts). Bacteria can be grown on acetic acid as the sole carbon source. Under this condition, these bacterial cells contain high levels of two enzymes that are not present when cells are grown on glucose instead as the sole carbon source. Name these two enzymes found at high levels in bacterial cells grown on acetic acid. (Use systematic or common name). Enzyme 1:______________________________________________________________________________ Enzyme 2:______________________________________________________________________________ CH 2 OH O H HO OH H OH H CH 2 OPO 3 2- C O H OH H CH 2 OPO 3 2- Winter 2004 BIS103-002 MIDTERM 2 March 4, 2004 page 4 Medium Short Answer (12 pts)....
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midterm2w04blankandkey - Winter 2004 BIS103-002 MIDTERM 2...

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