Which complex of the mitochondrial electron transport chain is the only one able to accept electrons directly from FADH2?NADH dehydrogenase (complex I)cytochrome b-c1 (complex III)cytochrome c oxidase (complex IV)the ATP synthase complexFADH2 dehydrogenase (complex II) The above reaction (FADH2 donating its electrons to the electron transport chain) takes place in which of the following eukaryotic cell locations?the mitochondrial matrixthe thylakoid membrane of chloroplaststhe chloroplast stromathe inner mitochondrial membranethe cytoplasm

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Description: Which complex of the mitochondrial electron transport chain is the only one able to accept electrons directly from FADH2?NADH dehydrogenase (complex I)cytochrome b-c1 (complex III)cytochrome c oxidase (complex IV)the ATP synthase complexFADH2 dehydro

Introduction In an electron transport chain, electrons move from one complex to another complex…

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The above reaction (FADH2 donating its electrons to the electron transport chain) takes place in which of the following eukaryotic cell locations? the mitochondrial matrix the thylakoid membrane of chloroplasts the chloroplast stroma the inner mitochondrial membrane the cytoplasm

The above reaction (FADH2 donating its electrons to the electron transport chain) takes place in which of the following eukaryotic cell locations? the mitochondrial matrix the thylakoid membrane of chloroplasts the chloroplast stroma the inner mitochondrial membrane the cytoplasm

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter8: How Cells Make Atp: Energy-releasing Pathways

Section8.2: The Four Stages Of Aerobic Respiration

Problem 1C

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The four complexes of the electron transport chain use the energy of electrons stored in reducing agents to create a concentration gradient of protons (H*) across the mitochondrial inner membrane. Give the number of protons pumped into the intermembrane space by each of the four complexes: complex I: complex II: complex III: complex IV:
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.
Carbon monoxide is considered toxic because it acts on Complex IV. How would the addition of carbon monoxide to actively respiring mitochondria affect the relative oxidation-reduction states of all components of the electron-transport chain? Complexes I and I would be reduced, but complexes II and IV would be oxidized because the electrons come from FADH2 oxidation, not NADH. O All four complexes would remain oxidized because they function as a multisystem complex. O Complexes I, II, and I would be reduced and Complex IV would be oxidized. All four complexes would remain reduced because they function as a multisystem complex Complexes I, II, and ill would be oxidized but Complex IV would remain reduced.
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
Cyanide is an inhibitor of Complex IV of the electron transport chain, i.e., it inhibits the reduction of oxygen to water. Dinitrophenol is a drug that collapses the H+ gradient across the inner mitochondrial membrane. You are given 2 bottles labeled “A” and “B”. One of them has cyanide and the other has dinitrophenol. You are tasked with identifying which of A or B is cyanide and which one is dinitrophenol. You are provided with the following items: A suspension of live, functioning mitochondria A pH-sensitive dye that can permeate both mitochondrial membranes (inner and outer and is red at low pH and blue at high pH. Make a flow-chart to show how you would do an experiment with the items provided to identify which bottle is cyanide and which is dinitrophenol.
Cyanide is an inhibitor of Complex IV of the electron transport chain, i.e., it inhibits the reduction of oxygen to water. Dinitrophenol is a drug that collapses the H+ gradient across the inner mitochondrial membrane. You are given 2 bottles labeled “A” and “B”. One of them has cyanide and the other has dinitrophenol. You are tasked with identifying which of A or B is cyanide and which one is dinitrophenol. You are provided with the following items: A suspension of live, functioning mitochondria A pH-sensitive dye that can permeate both mitochondrial membranes (inner and outer and is red at low pH and blue at high pH. First, what does it mean to say “collapse the H+ gradient”? Make a flow-chart to show how you would do an experiment with the items provided to identify which bottle is cyanide and which is dinitrophenol.
This UCP1 protein allows the protons (H+) of the mitochondrial intermembrane space to enter the mitochondrial matrix without going through the ATP synthase. This bypass represents a shortcut for protons and uncouples (i.e. eliminates the interrelationship between) the following two processes: The entry of protons inside the mitochondrial matrix, following their concentration gradient. The phosphorylation of ADP into ATP by the ATP synthase. It is this uncoupling that gave the protein its name: uncoupling protein 1 (UCP1). The following figure shows the location of UCP1 when it is expressed (synthesized) in the brown adipose tissues (BAT) of hibernating mammals. Question 12 Based on the UCP1 protein structure shown earlier, and based on the figure above, what type of protein is UCP1? Question 12 options: a) A primary active transporter. b) A motor protein.…
Which complex of the mitochondrial electron transport chain accepts electrons directly from NADH (the reduced form of nicotinamide adenine dinucleotide)? NADH dehydrogenase (complex I) FADH2 dehydrogenase (complex II) cytochrome b-c1 (complex III) cytochrome c oxidase (complex IV) the ATP synthase complex Chapter 14, Pg. 78
The maintenance of a proton motive force across the inner mitochondrial membrane is crucial for continued ATP production. Surprisingly, it has been discovered that the inner membranes of certain cells contain proteins, called uncoupling proteins, that are capable of transporting protons from the intermembrane space to the mitochondrial matrix. Why would mitochondria contain transporters that essentially waste energy potential in the proton gradient?
Which complex of the mitochondrial electron transport chain accepts electrons directly from NADH (the reduced form of nicotinamide adenine dinucleotide)? NADH dehydrogenase (complex I) FADH2 dehydrogenase (complex II) cytochrome b-c1 (complex III) cytochrome c oxidase (complex IV) the ATP synthase complex
All of the following components of the mitochondrial electron transport chain contain several nitrogen atoms, with the exception of: the cytochrome b-c1 complex the cytochrome c oxidase complex coenzyme Q (ubiquinone) the cytochrome a-a3 complex cytochrome c The most common enzyme in nature, used during the Calvin cycle, is called: ribulose bisphosphate carboxylase FADH2 dehydrogenase NADH dehydrogenase chlorophyll a chlorophyll b
The TCA cycle enzyme aconitase and the electron transport proteins have chromophores that absorb in the visible part of the spectrum, and therefore mitochondria have a dark brown color. In contrast, none of the glycolytic enzymes have visible spectrum chromophores. Which of the following statements is true? Question 3 Select one: a. Migrating birds, such as ducks have “white” breast meat, because flying long distances requires anaerobic ATP generation. d. The leg muscle of turkeys is specialized for anaerobic ATP generation via glycolysis. e. The flight muscle of turkeys is specialized for anaerobic ATP generation via glycolysis. f. None of the answers are correct.