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An iron-sulfur protein in Complex 3 donates an electron to cytochrome c1. The reduction half-reactions and Eº' values are shown below. a) write the balanced equation for the reaction and calculate the standard free energy change. b) How can you account for the fact that this reaction occurs spontaneously in the cell? FeS(ox) + e- ---> FeS(red) Eº' = 0.280 V cyt c1 (Fe3+) + e- ---> cyt c1 (Fe2+) Eº' = 0.215 V

An iron-sulfur protein in Complex 3 donates an electron to cytochrome c1. The reduction half-reactions and Eº' values are shown below. a) write the balanced equation for the reaction and calculate the standard free energy change. b) How can you account for the fact that this reaction occurs spontaneously in the cell? FeS(ox) + e- ---> FeS(red) Eº' = 0.280 V cyt c1 (Fe3+) + e- ---> cyt c1 (Fe2+) Eº' = 0.215 V

Biochemistry
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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An iron-sulfur protein in Complex 3 donates an electron to cytochrome c1. The reduction half-reactions and Eº' values are shown below. a) write the balanced equation for the reaction and calculate the standard free energy change. b) How can you account for the fact that this reaction occurs spontaneously in the cell?

FeS(ox) + e- ---> FeS(red) Eº' = 0.280 V

cyt c1 (Fe3+) + e- ---> cyt c1 (Fe2+) Eº' = 0.215 V

Question 20 of 25 View Policies Show Attempt History Current Attempt in Progress search AGO¹ = i (Tolerance is +/- 2%) INCORRECT; see section 15.1 An iron-sulfur protein in Complex III donates an electron to cytochrome c₁. The reduction half-reactions and Eº' values are shown below. Calculate the standard free energy change. Use 2 significant figures. FeS (ox) + e→→ FeS (red) 80¹ = 0.280 V cyt c₁ (Fe³+) + e¯→ cyt C₁ (Fe²+) Ɛ°¹ = 0.215V eTextbook and Media Hint r > 100 kJ. mol-¹ DELL 0/3 E NWP Assessment Pl... Accictoncelle 6.31
Transcribed Image Text:Question 20 of 25 View Policies Show Attempt History Current Attempt in Progress search AGO¹ = i (Tolerance is +/- 2%) INCORRECT; see section 15.1 An iron-sulfur protein in Complex III donates an electron to cytochrome c₁. The reduction half-reactions and Eº' values are shown below. Calculate the standard free energy change. Use 2 significant figures. FeS (ox) + e→→ FeS (red) 80¹ = 0.280 V cyt c₁ (Fe³+) + e¯→ cyt C₁ (Fe²+) Ɛ°¹ = 0.215V eTextbook and Media Hint r > 100 kJ. mol-¹ DELL 0/3 E NWP Assessment Pl... Accictoncelle 6.31
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