How do you expect inhibition of succinate dehydrogenase to effect the number of
ID: 40434 • Letter: H
Question
How do you expect inhibition of succinate dehydrogenase to effect the number of protons transported during ETC? Number of ATP produced?
2. Explain the defect(s) in the hypothetical scheme for the light reactions of photosynthesis shown below. 3. When studying electron transport and oxidative phosphorylation in E. coil that are growing on glucose as their sole carbon source, you add malonate, an inhibitor of succinate dehydrogenase, completely deactivating it. How do you expect this to affect the number of protons transported into the periplasmic space per glucose that is fully oxidized to CO2? How will it affect the number of ATP produced per glucose that is oxidized completely to CO2? You can assume that there is sufficient oxaloacetate so that no pyruvate needs to be used in anaplerotic reactions.Explanation / Answer
2) Please represent the Z scheme clearly in the fig.
3) Succinate dehydrogenase does not pump protons across the mitochondrial membrane, but it can accept two hydrogen atoms from succinate and forms FADH2. FADH2 leads to the production of 2 ATP molecules in the citric acid cycle. As it is not normed after the inhibition of succinate dehydrogenase, these 2 ATP molecules are not produced, only 9 ATP molecules will be produced from citric acid cycle.
The number of ATP's produced will be 2 number less.
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