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 4.
Question 4: (a) Define a simple representation of an amphipathic lipid molecule. What is the difference between saturated and unsaturated fatty acids? (b) Name the products of mild hydrolysis with dilute NaOH of 1-palmitoyl-2-oleoylphosphatidylcholine (See below figure). Oleoyl Glycerol Choline Palmitoy Phosphate
Question:- 2) oxaloacetate (OAA) occurs as an important intermediate in 2 metabolic processes a) indicate these reaction steps where OAA occurs b) indicate structure for OAA 3) how many reduced equivalents (as electron carrier) are obtained after an oxidation of C16H12O2? describe in detail the structure of these steps.
QUESTION 44 Which of the following statements is true? O a. Alcohol dehydrogenase catalyzes the conversion of lactate to ethanol. O b. Lactate dehydrogenase can work in both directions catalyzing the conversion of pyruvate to lactate and also lactate to pyruvate. O c. Lactic acid fermentation produces CO₂, but alcoholic fermentation does not. O d. Lactic acid fermentation occurs in the cytoplasm but alcoholic fermentation takes place in the matrix of the mitochondrion. O e. In alcoholic fermentation NADH reduces acetaldehyde to pyruvate. lick Save and Submit to save and submit. Click Save All Answers to save all answers. F4 $ % 700405 2 F2 # 3 20 MacBook Pro F3 6 1
QUESTION 2 Calculate the AG for the creation of an electrochemical gradient of protons in a mitochondrion, when the membrane potential is 225 mV and the pHs are 8 and 7 on the P side (intermembrane space) and the N side (matrix space) of the membrane respectively. R = 8.314 Jmol-K; T= 298 K; F = 96.5 kJ/V-mol Give your answer in 3 significant figures
Question 2 The typical difference in pH between the intermembrane space and the pH of the mitochondrial matrix is 0.750 units lower, and the Ay =yout - Yin = 0.168 V; and T-310 K. a) The E' for MTT can be assumed to be 0.4 V. Why is MTT reduced to formazan in living cells, but not considered to do so in dead cells? b) What can you state based on the information that botanical extracts can reduce MTT?
Question 25 Glucose can be metabolized to make ATP. In which pathway i) would the most total amount of ATP be made for a given amount of glucose (what you would want for long term energy provision); and ii) would ATP be made the fastest (what you would want during a sprint). i), glycolysis; ii) electron transport chain O i), electron transport chain; ii) glycolysis i), Kreb's cycle; ii) electron transport chain i) beta oxidation; ii) Kreb's cycle
QUESTION 34 Which of the following represents a reaction that could be used to refil the TCA cycle Aspartate -a -ketoglutarate Pyruvate Oxaloacetate O Oxaloacetate- Phosphoenol pyruvate Citrate - Oxaloacetate + acetyl COA
QUESTION 1 As your first experiment as a graduate student, your advisor asks you to reconstitute purified bacteriorhodopsin, a light- driven H+ pump from the plasma membrane of photosynthetic bacteria, and purified ATP synthase from ox-heart mitochondria together in the same membrane vesicles, as shown on the right. You work out a method so that all of the bacteriorhodopsin pumps H+ in one direction, into the vesicles. You then add ADP and Pi to the external medium and shine light onto the suspension of vesicles. What do you observe? purified ATP synthase purified bacteriorhodopsin detergent ADD PHOSPHOLIPIDS AND REMOVE DETERGENT LIGHT sealed vesicle (liposome) Figure Q14-18 Essential Cell Biology ale te Garland Science 2010) A NO ATP synthesis since no electron transport occurs. B. ATP synthase makes ATP. CATP synthase hydrolyzes ATP to pump H+ into the vesicles. D.No ATP synthesis since no H+ gradient is created. Click Save and Submit to save and submit. Click Save All Answers to…
Question 7 The malate transporter in the mitochondrial inner membrane is involved in two important biochemical processes: one catabolic, and one anabolic. What are they? Transport of NAD* from glycolysis from the cytosol to the matrix for oxidative phosphorylation, and the last step of glycolysis O A. The citric acid cycle, and the last step of glycolysis OB. The glycerol 3-phosphate shuttle system, and the first gluconeogenesis bypass Transport of FADH, from beta oxidation from the cytosol to the matrix for oxidative phosphorylation, and the first gluconeogenesis bypass OF Transport of NADH from glycolysis from the cytosol to the matrix for oxidative phosphorylation, and the first gluconeogenesis bypass
Question 12 The breakdown of large molecules by the enzymatic addition of water is an example of what kind of reaction? a. reduction O b. oxidation O c. hydrolysis O d. condensation O e. decarboxylation
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