In the initial step of the Q cycle, the electrons of QH2 (or ubiquinol) are transferredto:OA) cytochrome c₁ and cytochrome b.B) cytochrome c₁ and Q (or ubiquinone).cytochrome C₁ and Q (or semiubiquinol).OD) cytochrome b and Q.

The complex III of the electron transport chain ( Q-cytochrome c oxidoreductase) consists of three…

Answered: In the initial step of the Q cycle, the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Which of the following best describes the action of cytochrome c oxidase? a. Cytochrome c oxidase combines water and oxygen to produce hydrogen peroxide. b. Cytochrome c oxidase transports electrons out of the respiratory reaction. c. Cytochrome c oxidase enables oxygen to accept electrons at the end of the electron transport respiratory chain. d. Cytochrome c oxidase converts hydrogen peroxide into water and oxygen. e. Cytochrome c oxidase reduces thiosulfate anion to hydrogen sulfide.
The first half of the Q cycle results in which of the following? Please make each of the following wrong answers correct: A) transfer of 4 protons to the intermembrane space B) 2 molecules of reduced cytochrome c C) Return of one UGH2 to the coenzyme Q pool
Which of the following is the correct sequence in the ETC? A. NADH → CoQ → cytochrome c → Fe-S → O2 B. NADH → CoQ → E-FMN → cytochrome c → O2 C. FADH2 → Fe-S → CoQ → cytochrome c → O2 D. FADH2 → succinate → CoQ → cytochrome b → O2
Which of the following sequences of electron carriers could represent a workable bacterial electron transport chain? a. cytochromes, followed by an iron-sulfur protein, and quinones. b. quinones, cytochromes, iron-sulfur proteins, and a flavoprotein. c. a flavoprotein, followed by an iron-sulfur protein, quinones, and cytochromes. d. cytochromes, followed by quinones and a flavoprotein.
Which of the following sequences of electron carriers could represent a workable bacterial electron transport chain? a. cytochromes, followed by an iron-sulfur protein, and quinones. b. quinones, cytochromes, iron-sulfur proteins, and a flavoprotein. c. a flavoprotein, followed by an iron-sulfur protein, quinones, and cytochromes. d. cytochromes, followed by quinones and a flavoprotein. The Tricarboxylic Acid Pathway (Kreb’s Cycle) supplies most of the precursors (carbon skeletons) of the amino acids used in protein synthesis. The rest are derived from intermediates of a. Glycolysis. b. the Pentose Phosphate Pathway. c. the Glyoxylate Pathway. d. Glycolysis and the Pentose Phosphate Pathway. Fermentation of pyruvate to ethanol supports glycolysis by a. reducing excess pyruvate. b. oxidizing excess glucose-6-phosphate. c. oxidizing reduced NAD. d. oxidizing excess ethanol.
Is the reduced form of cytochrome c more likely to give up its electron to oxidized cytochrome a or cytochrome b?
If both complex I and complex II send electrons to cytochrome c, how many cytochrome c molecules will it take to deliver those electrons to complex IV? Assume that complex I received one NADH and complex I catalyzed oxidation of one succinate.
_____________ catalyzes the redox reaction between UQH2 and cytochrome c.
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)
Place the following components of the electron-transport chain in their proper order: (a) cytochrome c (b) Q-cytochrome coxidoreductase (c) NADH-Q reductase (d) cytochrome c oxidase (e) ubiquinone
The photosynthetic process used by the green sulfur bacteria, under anaerobic conditions, is best represented by which of the following balanced equations? 6CO2 + 12H2O  C6H12O6 + 6O2 + 6H2O 6CO2 + 12H2S  C6H12O6 + 6S2 + 6H2O C12H22O11 + H2O  C6H12O6 + C6H12O6 C6H12O6 + C6H12O6  C12H22O11 + H2O C6H12O6 + 6O2 + 6H2O  6CO2 + 12H2O
name the remaining 4 carbon molecules of the TCA cycle?

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In the initial step of the Q cycle, the electrons of QH2 (or ubiquinol) are transferred to: OA) cytochrome c₁ and cytochrome b. B) cytochrome c₁ and Q (or ubiquinone). OC) cytochrome c₁ and Q (or semiubiquinol). OD) cytochrome band Q.