In oxidative phosphorylation.... 1. Succinate contributes 2e- to Complex II and 2H+ to the mitochondrial proton gradient. 2. NADH in the matrix passes 2 e- to coenzyme Q via Complex I. 3. Complexes I, II, III, and IV each contribute to the matrix proton gradient. 4. O2 stabilizes the catalytically active conformation of Complex V. 5. Reversible protonation of c subunits leads to rotation of the Complex V gamma subunit. 6. Each β subunit can bind ATP tightly under the right conditions. 7. For every 3 protons that pass across the inner mitochondrial membrane, 1 ATP is produced. Choose all options that are true.

In oxidative phosphorylation.... 1. Succinate contributes 2e- to Complex II and 2H+ to the mitochondrial proton gradient. 2. NADH in the matrix passes 2 e- to coenzyme Q via Complex I. 3. Complexes I, II, III, and IV each contribute to the matrix proton gradient. 4. O2 stabilizes the catalytically active conformation of Complex V. 5. Reversible protonation of c subunits leads to rotation of the Complex V gamma subunit. 6. Each β subunit can bind ATP tightly under the right conditions. 7. For every 3 protons that pass across the inner mitochondrial membrane, 1 ATP is produced. Choose all options that are true.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter7: Cellular Respiration: Harvesting Chemical Energy

Section: Chapter Questions

Problem 7TYK

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In oxidative phosphorylation (mark all that are true)... Choice 1 of 7:Succinate contributes 2e- to Complex II and 2H+ to the mitochondrial proton gradient. Choice 2 of 7:NADH in the matrix passes 2 e- to coenzyme Q via Complex I. Choice 3 of 7:Complexes I, II, III, and IV each contribute to the matrix proton gradient. Choice 4 of 7:O2 stabilizes the catalytically active conformation of Complex V. Choice 5 of 7:Reversible protonation of c subunits leads to rotation of the Complex V gamma subunit. Choice 6 of 7:Each β subunit can bind ATP tightly under the right conditions. Choice 7 of 7:For every 3 protons that pass across the inner mitochondrial membrane, 1 ATP is produced. Below are screenshots of the answer from two different sources (for your consideration)
During Cytochrome P450-catalyzed monooxygenation... ... iron is being both reduced and oxidized, while other atoms never change their oxidation state iron is being reduced, while hydrogen is being oxidized O O O ... oxygen is being reduced, while hydrogen is being oxidized carbon is being reduced, while hydrogen is being oxidized carbon is being oxidized, while oxygen is being reduced
Given that malonate inhibits succinate dehydrogenase which of the following statements is TRUE? a. FADH2 results in only 4 H+ being pumped out of the mitochondrial matrix. b. All electron transport is inhibited. c. Transfer of electrons from NADH to Coenzyme Q (ubiquinone) is inhibited. d. Transfer of electrons from FADH2 to Coenzyme Q (ubiquinone) is inhibited. e. NADH results in only 4 H+ being pumped out of the mitochondrial matrix. Clear my choice
1. Name and draw diagrammatically the series of mitochondrial electron transfer catalysts, starting with the oxidation of NADH and succinate and ending with the reduction of O2. 2. Indicate the sites and stoichiometry (per 2e) at which protons are translocated from the matrix to the intermembrane space. 3. Indicate which complexes are inhibited by: amytal, antimycin A, azide (N3 ), cyanide (CN), carbon monoxide (CO), and rotenone. 4. Describe the effects of (1) oligomycin and (2) uncouplers of oxidative phosphorylation, e.g., dinitrophenol (DNP), carbonyl cyanide-p- trifluoromethoxyphenylhydrazone (FCCP), on respiration and ATP synthesis when added to a suspension of mitochondria with excess malate, ADP, and inorganic phosphate (Pi).
14. Inhibitors. Rotenone inhibits electron flow through NADH-Q oxidoreductase. Antimycin A blocks electron flow between cytochromes b and c₁. Cyanide blocks elec- tron flow through cytochrome oxidase to O₂. Predict the relative oxidation-reduction state of each of the following respiratory-chain components in mitochondria that are treated with each of the inhibitors: (a) NAD+ (b) NADH-Q oxidoreductase (c) coenzyme Q (d) cytochrome c₁ (e) cytochrome c (f) cytochrome a
1. Identify the oxidized coenzyme (letter abbreviation only) that participates in this reaction of the Kreb’s cycle. Succinate --> Fumarate 2. How many mol of NADH can be obtained upon the beta oxidation of stearic acid? 3. How many mol of ATP can be obtained upon the complete oxidation of 1 mol stearic acid? 4. How many steps in glycolysis in which ATO is converted to ADP?
What is the major route for protons moving from the inter membrane space back into the mitochondrial matrix during oxidative phosphorylation? 1. Protons carried across the membrane by a molecule of dinitrophenol 2. Protons are transported along with ADP by the ATP/ADP translocase.3. Protons enter the half channel in subunit a facing the inter membrane space and exit via the half channel facing the mitochondrial matrix. Choose 1 correct answer explain? Give typing answer with explanation and conclusion
2. 'a) List the number of NADH and FADH2 equivalents formed and the corresponding number or ATP equivalents generated by mitochondrial oxidation of one molecule of CH3(CH2)12-COSCOA Number of NADH or Number of ATP Enzyme catalyzing the oxidation step FADH, formed ultimately formed B Oxidation Acyl-CoA dehydrogenase B-Hydroxyacyl-CoA dehydrogenase Citric acid cycle Isocitrate dehydrogenase a-Ketoglutarate dehydrogenase Succinyl-CoA synthetase Succinate dehydrogenase Malate dehydrogenase Total "These calculations assume that mitochondrial oxidative phosphorylation produces 1.5 ATP per FADH2 oxidized and 2.5 ATP per NADH oxidized. "GTP produced directly in this step yields ATP in the reaction catalyzed by nucleoside diphosphate kinase (p. 516). For all of the questions below, assume that respiratory activity of mitochondria is supported by CH3(CH2)12-COSCOA in the presence of excess ADP (+ P). (b) How many ATP equivalents will be generated in the presence of the inhibitor rotenone? Give a…
1. True / False: NADH dehydrogenase is the least electronegative complex of the ETC. 2. True / False: Most of the energy lost during the conversion of one form to another is as light. 3. True / False: The addition of a phosphate group is called phosphorylation. 4. True / False: The ETC pumps protons into the mitochondrial matrix. 5. True / False: FADH₂ transfers its electrons directly to cytochrome c. 6. True / False: FADH₂ is created exclusively during the citric acid cycle. 7. True/False: Alcohol fermentation occurs most commonly in animals and plants. 8. True / False: During fermentation, NAD* is regenerated when NADH is reduced. 9. True / False: The hydrolysis of ATP releases free energy. 10. True / False: Most of the CO₂ produced by cellular respiration is formed during ETC/chemiosmosis.
2. (a) List the number of NADH and FADH2 equivalents formed and the corresponding number of ATP equivalents generated by mitochondrial oxidation of one molecule of CH3(CH2) 12-COSCOA Number of NADH or FADH₂ formed Number of ATP ultimately formedª Enzyme catalyzing the oxidation step B Oxidation Acyl-CoA dehydrogenase B-Hydroxyacyl-CoA dehydrogenase Citric acid cycle Isocitrate dehydrogenase a-ketoglutarate dehydrogenase Succinyl-CoA synthetase Succinate dehydrogenase Malate dehydrogenase Total aThese calculations assume that mitochondrial oxidative phosphorylation produces 1.5 ATP per FADH2 oxidized and 2.5 ATP per NADH oxidized. GTP produced directly in this step yields ATP in the reaction catalyzed by nucleoside diphosphate kinase (p. 516).
1. Explain the Chemiosmotic theory with regard to ATP generation in oxidative phosphorylation. 2. Explain how Phosphorylase activation differs between the liver and the muscle. What is the role of Epinephrine in Glycogen metabolism. 3. List all the materials required for beta-oxidation of cholesterol from six-carbon intermediate Mevalonate.
2. Please, determine the answers of these multiple choices, they’re in a,b,c’s. A) The role of oxygen in oxidative phosphorylation (cellular breathing) is: -To be the last electron acceptor in the electron transfer chain -To hydrolyse carbohydrates - To add hydrogen ions to pyruvic acid at the end of glycolysis -To provide electrons for NADP reduction -To provide hydrogen ions B) Which molecule has the most potential energy? -glucose -phosphate -fructose 1-6 diphosphate -ethanol -I'ATP C) What is the product of fermentation in yeasts? -carbonic acid -oxygen -ATP -lactic acid -ethanol