Question #3 Complex III (cytochrome bc₁ complex) in the electron transport chain transfers electrons from reducedcoenzyme Q to cytochrome c.3A. Write a balanced equation for the overall redox reaction performed by complex III. Indicate the electron donor andacceptor in the redox reaction. [Do not include the intermediates in this overall reaction. Do not account for protonpumping].3B. Calculate the change in the standard reduction potential for this reaction. [see table on page 2].3C Which has a lower amount of free energy at the standard state, the products or the reactants?

Complex III of the Electron Transport Chain (ETC) undertakes the transfer of electrons from…

Answered: Question #3 Complex III (cytochrome bc₁…

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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Question 10 ( Which statement is CORRECT? A) Glucokinase is not inhibited by glucose-6-phosphate B) Pyruvate kinase is allosterically activated by alanine OC) Phosphofructokinase is activated in the liver by citrate D) The dehydration reaction by enolase is irreversible due to a AG of -34 kJ/mol E) Inhibition of phosphofructokinase leads to the activation of hexokinase
QUESTION 11 Serine esterase contains a catalytic triad at its active site. Which amino acid in serine esterase is responsible for mediating general acid catalysis for the breakdown of tetrahedral intermediate to the carboxyl product?
QUESTION 1 a. John has just taken his Lunch meal, after which he is going to takes his Daily soccer practice match in the next 30 min, how will glycolysis operate/work in such conditions or be applicable b. How will oxidative phosphorylation work in sickly John who usually practice daily in soccer? Make possible scenarios c. Enzymes are critical in the metabolism of most most organic compounds, actually 30% of reactions are catalysed by them. How would the inactive enzymes (Sickness) in electron Transport Chain compromise the fat breakdown in the body.
QUESTION 18 Explain the reason why at low ATP concentrations the velocity of PFK-1 is faster than when high ATP concentrations are present. Low (ATP) High (ATP) (Fructose 6-phosphate) PFK-1 activity
Question #12 An actively respiring bacterial culture is supplied with acetyl-CoA labeled on the methyl carbon with carbon- 14 (carbon-14 is radioactive). Shortly after adding the label the citric acid intermediates are isolated and the position of the carbon-14 atom is determined. 12A Where is the carbon-14 label on oxaloacetate after two turns of the citric acid cycle? Consider only the initial incorporation of carbon-14 in the first pass of labeled pyruvate through the citric acid cycle. relevant structures that show how pyruvate is transformed to alpha-ketoglutarate. No mechanisms are required, but provide balanced equations. You do not need to draw the structures of cofactors] draw the 12B. Suppose both of the acetyl-CoA acetate carbons were carbon-14 labeled. When does the first decarboxylation producing a radioactive 14CO2 occur?
QUESTION 12 What chemical species does chymotrypsin stabilize the most during the course of the reaction? OA. the transition state O B. the substrate OC. the product(s) OD. the ES complex CE. the tetrahedral intermediate
Question 8, 11, and 12
Question 3: A runner just finished a marathon. For the enzymes listed below, indicate whether the enzyme activity is upregulated (1) or downregulated (↓) in the muscle and liver, respectively. Enzyme (a) Glycogen synthase (b) Phosphofructokinase-1 (c) Fructose-Bisphosphatase-2 (d) Pyruvate kinase (e) Pyruvate carboxylase (f) Acetyl-CoA carboxylase Muscle Liver
Question:- 33) Glucose-6-phosphate has different pathways that it can enter in the liver during the fed state. All of the following are possible except OA.) it is oxidized to acetyl CoA for fatty acid biosynthesis O B). it can enter the pathway for glycogen biosynthesis O c.) it is a substrate for glucose-6-phosphatase OD. )it is oxidized in glycolysis to provide energy for the body

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