Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 14.3, Problem 1TQ
Summary Introduction
To review:
The function of oxidoreductase in the electron transport chain and the reason for indirect interaction between oxidoreductase and cytochrome complex.
Introduction:
A series of complexes that transfer an electron from electron donors to the electron acceptors through reduction and oxidation
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Why do the cytochrome electron-transfer processes have different standard reduction potentials, despite the fact that they all utilize the identical iron oxidation–reduction reaction?
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Chapter 14 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 14.1 - Prob. 1TQCh. 14.1 - Prob. 2TQCh. 14.2 - Prob. 1TQCh. 14.2 - Prob. 2TQCh. 14.2 - Prob. 3TQCh. 14.3 - Prob. 1TQCh. 14.3 - Prob. 2TQCh. 14.3 - Prob. 3TQCh. 14.4 - Prob. 1TQCh. 14.5 - Prob. 1TQ
Ch. 14.5 - Prob. 2TQCh. 14.6 - Prob. 1TQCh. 14 - Prob. 1RQCh. 14 - Prob. 2RQCh. 14 - Prob. 3RQCh. 14 - Prob. 4RQCh. 14 - Prob. 5RQCh. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Prob. 8RQCh. 14 - Prob. 9RQCh. 14 - Prob. 10RQCh. 14 - Prob. 11RQCh. 14 - Prob. 1TQCh. 14 - Prob. 2TQCh. 14 - Prob. 3TQCh. 14 - Prob. 4TQ
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- Discuss the role of E286 in the proton transfer carried out by cytochrome c oxidase. What are the D- and K-pathways? What is the fate of the protons from these two pathways? What is the role of E286? What three mechanisms contribute to the movement of the protons along these pathways?arrow_forwardYou experiementally apply the compund antimyctin, which inhinits the functioning of complex III, cytochrome reductase, from participating in redox reactions. You follow this with the addition of 6 molecules of FADH2. How many total ATP molecules can be created using the number of protons that were pumped?arrow_forwardGlyceraldehyde 3-phosphate dehydrogenase in chloroplasts uses NADPH to participate in the synthesis of glucose. In gluconeogenesis in the cytoplasm, the isozyme of the dehydrogenase uses NADH. Why is it advantageous for the chloroplast enzyme to use NADPH?arrow_forward
- Why, do you suppose, the coenzyme for the reaction in the citric acid cycle that is catalyzed by succinate dehydrogenase is FAD and not NAD+?arrow_forwardIf the order for the electron transport chain starting from NADH to Oxygen is this: NADH-->Flavin mononucleotide (FMN)--> Coenzyme Q (CoQ) --> Cytochrome b (Cyt b)--> Cytochrome c (Cyt C)--> Cytochrome a3 (cyt a3) --> Oxygen (O2) Then, what is the order for the electron transport chain starting with FADH2 to oxygen (O2)?arrow_forwardWhy is it important that NADH can be converted back to NAD + during anaerobic respiration?arrow_forward
- Name the molecules that conserve most of the energy from the redox reactions of the citric acid cycle (see Figure 9.12). How is this energy converted to a form that can be used to make ATP?arrow_forwardReferring to figure 5 and 8 which substrate molecule serves as the phosphate donor during substrate-level phosphorylation in step 10 of glycosis and the succinyl CoA-succinate step of the Krebs Cycle?arrow_forwardFrom what you learned about classifying enzymes in Section 21.9, explain why the enzyme used to convert succinate to fumarate is called succinate dehydrogenase.arrow_forward
- Suppose that aconitase did not bind its substrate asymmetrically. What fraction of the carbon atoms introduced in one cycle as acetyl-CoA would be released in the first turn of the cycle? What fraction of the carbon atoms that entered in the first cycle would be released in the second turn?arrow_forwardWhy does FAD accepts 2 protons in dehydration of succinate to fumarate? Why dont NAD molecules participate in this reaction?arrow_forwardIs the reduced form of cytochrome c more likely to give up its electron to oxidized cytochrome a or cytochrome b?arrow_forward
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