The following statements describe the path of electrons from NADH through the electron transport chain. Please arrange them in order: Cytochrome c (Fe2+) carries electrons to Complex IV. Cytochrome c (Fe3+) is reduced to cytochrome c (Fe2+) QH2 carries electrons to Complex III Oxygen is reduced to water Ubiquinone (coenzyme Q) is reduced to ubiquinol (QH2)

The following statements describe the path of electrons from NADH through the electron transport chain. Please arrange them in order: Cytochrome c (Fe2+) carries electrons to Complex IV. Cytochrome c (Fe3+) is reduced to cytochrome c (Fe2+) QH2 carries electrons to Complex III Oxygen is reduced to water Ubiquinone (coenzyme Q) is reduced to ubiquinol (QH2)

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter2: Cell Physiology

Section: Chapter Questions

Problem 10RE: Using the answer code on the right, indicate which form of energy production is being described: 1....

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FADH2 is a less powerful reducing agent (electron donor) than NADH. What is the consequence of this in oxidative phosphorylation? FADH, requires more steps than NADH does in electron transport to become oxidized. The electrons from FADH2 enter electron transport at a higher energy level than the electrons from NADH. A molecule of FADH, is only capable of producing 2 molecules of ATP, while a molecule of NADH is capable of producing 3 molecules of ATP. Oxidation of FADH, occurs in the cytoplasm of the cell, while oxidation of NADH occurs in the mitochondria. FADH, can only donate 1 phosphate group to ATP, while NADH can donate 2 phosphate groups to ATP.
ATP NAD+ FADH2 Coenzyme A ATP synthase oxidizing agent in metabolism enzyme "motor" located on the inner membrane of mitochondrial works with CoQ10 in oxidative phosphorylation shuttles electrons in the e- transport chain provides energy to drive an endergonic reaction forward shuttles two-carbon units (acetyl groups) reducing agent in metabolism turns pyruvate to lactate in anaerobic conditions
The electron-transport chain consists of a number of multi protein complexes, which work in conjunction to pass electrons from an electron carrier, such as NADH, to O2. What is the role of these complexes in ATP synthesis? It has been demonstrated that respiration supercomplexes contain all the protein components necessary for respiration. Why is this beneficial for ATP synthesis, and what is one way that the existence of super complexes has been demonstrated experimentally? Coenzyme Q (CoQ) is not a protein, but a small, hydrophobic molecule. Why is it important for the functioning of the electron transport chain that CoQ is a hydrophobic molecule?
A poison that prevents the transfer of electrons from the last [Fe-S] cluster of Complex I to coenzyme Q is added to a suspension of actively respiring mitochondria. Which of the following will be observed? ATP production would be impaired due to the uncoupling of oxidative phosphorylation from electron transport. ATP production would be reduced due to inhibition of the CoQ subunit of ATP synthase. ATP production would be reduced due to a decrease in the number of protons pumped out of the mitochondrial matrix. ATP production would be halted completely due to the block in electron transport through the electron transport chain.
DCCD (diocyclohexylcarbodiimide) inhibits oxidative phosphorylation when the substrate is mitochondrial NADH. DCCD is a drug that binds to ATP synthase and blocks proton transport through the ion channel. a) Explain what the consequences of DCCD on cellular energy production are. b) Suggest at least one other cellular effect of DCCD and explain this effect.
For the theoretical maximum yield of ATP per glucose molecule oxidized by aerobic respiration, we will assume that for each pair of electrons transferred to the electron transport chain by NADH, 3 ATP will be generated; for each electron pair transferred by FADH2, 2 ATP will be generated. If NADH is produced in the cytoplasm, it will only generate 2 ATP but NADH produced in the mitochondria will release 3 ATP. 1. How many molecules of ATP are produced when 10 molecules of FADH2 enter the electron transport chain? 2. How many molecules of ATP may be produced when 8 molecules of NADH from glycolysis enter the electron transport chain? 3. How many molecules of ATP are produced when 10 molecules of NADH formed during the Krebs cycle enter the electron transport chain? 4. n a molecule of glucose, how many molecules of FADH2 will be produced? 5. n a complete breakdown of a molecule of glucose, how many molecules of NADH had been produced?
Referring to the figure below, explain why NADH yields more ATP than FADH2 does. Electron-transport and proton pump Oxidative phosphorylation Outer mitochondrial membrane H* -Intermembrane H+ H+ H+ space H* H+ H+ Cytochrome c H+ COQH, CoQ UU COQH2 CoQ JU U Inner mitochondrial membrane Ht e ATPase Complex II Complex II Complex IV Complex e ADP +P - Mitochondrial matrix NADH NAD+ FADH2 FAD АТР H+ -H+ H+ H20
Which of the following statements concerning the complete oxidation of FADH2 in the electron transport chain is NOT true? a. In the final step, electrons from cytochrome c to O2 reducing it to H2O in complex IV, and four protons are transported from the intermembrane space to the matrix. b. In the first step, electrons from FADH2 are transferred in complex II to ubiquinone, which does not transport any proton across the inner mitochondrion membrane. c. In the second step, complex III transfers the electrons from ubiquinone to cytochrome c, and four protons are transported from the matrix to the intermembrane space. d. The complete oxidation of FADH2 causes transfer of 6 protons and yields two ATP.
Some cofactors that participate in the reactions of the citric acid cycle are indicated by letters. Identify the position of positions of NADH in the cycle by selecting the appropriate letter or letters designating its position(s) in the cycle diagram. COA CH, HO--Co, CH čo, 8 CO но-сн CH HC -Co, CO HO-CH LA Citric acid cycle H,0 co, -B COA | 4 Co, čo D.
Which of the following statements is right: Reduced NAD from Beta-oxidation is used to produce ATP in: 1. Electron Chain Transport and oxidizing phosphate binding 2. Glycolysis and oxidizing phosphate binding 3. Transamination 4. Citric Acid Cycle and oxidizing phospahe binding 5. None above are right
Which of the following best describes the net organic products formed during the oxidation of one acetyl group to two molecules of carbon dioxide via the citric acid cycle? 3 NADH + 1 FADH2 + 1 GTP 2 NADH + 2 FADH2 + 2 ATP 1 NADH + 3 FADH2 + 1 GTP 6 NADH + 6 ATP 3 NADH
Cyanide poisoning inhibits aerobic respiration at cytochrome c oxidase. Which of the following is NOT a result of cyanide poisoning at the cellular level? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d e Oxygen is reduced to water The rate of glycolysis increases Cells are forced to switch to anaerobic respiration The electron transport chain is not completed None of the above Answered K Open in Reading View ✔Posubmit