quiz 10 key spring 2010

quiz 10 key spring 2010 - 2 3 pt What will happen to ATP...

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Quiz #10 1. 3pt. 2.5 ATPs are generated for every molecule of NADH oxidized through the mitochondrial electron transport system but only 1.5 ATPs are generated for every molecule of FADH 2 . Use your knowledge of the electron transport chain to explain why these numbers are different. Oxidation of FADH 2 is associated with the translocation of fewer protons than oxidation of NADH. (OR FADH 2 bypasses Complex I) Fewer protons pumped -> less potential energy in the gradient -> fewer ATP
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Unformatted text preview: 2. 3 pt. What will happen to ATP synthesis if the inner mitochondrial membrane becomes permeable to protons? No ATP synthesis occurs (full credit) because the proton gradient is disrupted. 3. 4 pts Define photorespiration, and describe the property of the enzyme rubisco that leads to its occurrence. Photorespiration is an oxygen-consuming side reaction to the Calvin cycle. Photorespiration occurs because Rubisco has low specificity and thus can use O 2 as a substrate....
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