ExtraCreditHomework10KEY - Name: KEY EID: Extra Credit...

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Name: KEY EID: Extra Credit Homework #10 Complete questions below and hand in to a TA by the end of class, Wednesday, Nov. 23. 1. Ubiquinone can accept either 1 or 2 electrons. Draw the product of ubiquinone after it has accepted a) an electron and a proton and b) another electron and another proton. O O R CH 3 MeO MeO OH R CH 3 MeO MeO O OH R CH 3 MeO MeO OH Ubiquinone (Q) 1 electron & 1 proton 2. Redraw the Q-cycle shown in Figure 19-12. (1 st half) QH 2 + Q + cytc 1 (oxidized) Q + Q - + 2H + (P side) + cytc 1 (reduced) (2 nd half) QH 2 + Q - +2 H + (N side) + cytc 1 (oxidized) Q + 2H + (P side) + QH 2 + cytc 1 (reduced) Net equation: QH 2 + 2cytc 1 (oxidized) + 2H + (N side) Q + 2cytc 1 (reduced) + 4H + (P side) First, Q on the N side is oxidized to the semiquinone radical; meanwhile, on the P side, two molecules of QH 2 are oxidized to Q, releasing 2 protons per Q molecule into the intermembrane space.
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3. Explain why mitochondria incubated with succinate, ADP, and P
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This note was uploaded on 02/06/2012 for the course BIOCHEMIST 339K taught by Professor Keating-clay during the Spring '11 term at University of Texas at Austin.

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ExtraCreditHomework10KEY - Name: KEY EID: Extra Credit...

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