What percentage of energy from succinate electron transfer is conserved in the proton gradient? (Compare the delta G value (20kj/mol energy to pump protons up the gradient for each one mole of succinate that enters the electron transport chain) to the delta G'o value(-151kj/mol succinate oxidation with reduction of 1/2 O2) to make a rough estimate)
The overall delta G value in succinate electron transfer system
= (20-151) kj/mole
= - 131 kj/mole
Therefore percentage of energy conserved from succinate electron transfer system conserved in proton gradient,
= (20 / 131) × 100
= 15.3 %
What percentage of energy from succinate electron transfer is conserved in the proton gradient? (Compare the...
The electron transport chain consists of protein complexes embedded in the inner mitochondrial membrane, where it generat a proton gradient by a series of oxidation-reduction, or redox, reactions. Although all of the stages of cellular respiration (glycolysis, the citric acid cycle, and the electron transport chain) are necessary for life, the electron transport chain is sometimes called the most important stage. First complete the sentence, then answer the question. The electron transport chain uses the transfer of protons between protein...
what will happen to the proton gradient produced by the electron transport chain in the presence of carbon dioxide? are the protons still going to go against their concentration gradient in the presence of carbon dioxide? are they still going to go down their concentration gradient?
Which complex in the electron transport chain does not contribute to the proton gradient across the mitochondrial membrane? A. Complex I B. Complex IV C. Complex II D. Complex III Which statement regarding the mitochondrial electron transport chain and oxidative phosphorylation is true? A. Ubiquinone and the F zero subunit of ATP synthase are peripheral membrane proteins. B. Complexes I, II, III, and IV all are proton pumps. C. The final electron acceptor is water. D. Complex II is considered...
2. What would happen to each of the following if reduced the supply of glucose to cells by 50%? You may assume that the cell will NOT switch to an alternative energy source. Briefly explain why for each. A. The level of glycolysis activity. B. The level of Krebs Cycle activity. C. The level of activity in the electron transport chain in the mitochondria. D. The size of the proton gradient across the inner mitochondrial membrane. E. The rate of...
Which of the following could explain why transfer of electrons from FADH2 to Coenzyme Q (CoQ) is not coupled to proton transfer, but transfer from NADH to Coenzyme Q is? Select one: a. FADH2 donates more electrons than NADH to the electron transport chain. b. Because FADH2 has higher affinity for electrons than Coenzyme Q c. Because FADH2 is a higher energy carrier than NADH d. Because the transfer of electrons from FADH2 to CoQ does not release enough energy....
1. Which one of the following shows the correct sequence of energy transitions during chemiosmosis? A. NADH → electron acceptors → proton gradient → ATP synthase → ATP B. NADH → NAD+ → FADH2 → electron acceptors → ATP C. carbohydrates → acetyl CoA → CO2 → proton gradient → ATP D. NAD+ → NADH → protons → ADP → ATP E. glucose → pyruvate → acetyl CoA → NADH → ATP 2. Facultative anaerobes: A. prefer carbon dioxide. B....
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11. (13 pts) Electron transfer Electron transfer translocates protons from the mitochondrial matrix to the external medium, establishing a pH gradient across the inner membrane (outside more acidic than inside). The tendency of protons to diffuse back into the matrix is the driving force for ATP synthesis by ATP synthase. During oxidative phosphorylation by a suspension of mitochondria in a medium of pH 6.9, the pH of the matrix has been measured as 7.7....
1. Which of the below schematics most accurately depicts the flow of electrons through the electron transport chain? A Complex I-Complex Il-Complex IIl Complex IV Complex → Complex-Complex 111 Complex V C Complex IV-Complex IlI- Complex II ComplexI D Complex Complex Ⅲ→ Complex Ⅳ Complex > 2. Which of the following molecules is NOT an electron carrier that participates in the electron transport chain? A. FMNH2 B. Ubiquinol incorrect C. Cytochrome c D. NADPH 3. What is the final electron...
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11) What is the amount of ATP produced through oxidation of 1 mole of NADH through energy produced by electron transport chain? A) 4.5 moles B) 3.5 moles C) 2.5 moles D) 1.5 moles 12) Which of the statement is TRUE for flavoproteins involved in electron transport chain? A) The flavoproteins contains a dominant squalene structure. B) The complex III and complex IV contains flavoproteins C) Flavin nucleotides of flavoproteins...
Cellular respiration: The Electron Transport Chain The breakdown of glucose ends during the Krebs cydle; however, it is important to note that the energy previously contained in glucose is mostly stored in NADH and FADHz. In the last step of celular respiration, the high-energy electrons within NADH and FADH2 are passed within a set of proteins found in the inner membrane of the mitochondrion, collectively known as the electron transport chain. The electrons provide the energy to create ATP, which...