Which of the following statements concerning the electron transport chain is false? a. The final electron acceptor is oxygen. b. Each NADH yields three ATP molecules. c. Each FADH2 yields two ATP molecules. d. The electron transport chain will work whether oxygen is present or not.
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Which of the following statements about the electron transport chain in cell respiration is CORRECT?
The electron transport chain of proteins contains pores that are leaky to H.
The loss in free energy of the electron initially donated by NADH is used to transport H+ across the inner mitochondrial membrane against its electro
The ATP synthase generates a H+ gradient across the inner mitochondrial membrane.
The electron transport chain of proteins uses ATP to pump H+ across the inner mitochondria membrane against its electrochemical gradient
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State whether the following statements are true or false. The carrier molecules of the electron transport system are located in the cytosol.
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Which of the following statements about the electron transport chain is true? Group of answer choices A) It is driven by ATP hydrolysis. B) It includes a series of hydrolysis reactions associated with mitochondrial membranes. C) It consists of a series of redox reactions D) It occurs in the cytoplasm of both prokaryotic and eukaryotic cells.
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Which of the following statements about the electron transport chain is true? 1 Water is the last electron acceptor. 2 The electron transport chain is the first step in cellular respiration. 3 NADH and FADH2 donate their electrons to the chain. 4 Electrons gain energy as they move down the chain.
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Which one of the following statements about the redox reactions of the electron transport chain is correct? 1 NADH gains electrons in the initial reaction of the electron transport chain. 2 The electron transport chain takes electrons from water and gives them to oxygen. 3 The oxidation of NADH is directly coupled to the reduction of oxygen to water. 4 The redox reactions of the electron transport chain are directly coupled to the movement of protons across a membrane. 5 The redox reactions of the electron transport chain are directly coupled with the synthesis of ATP.
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Which of the following statements about the chemiosmotic synthesis of ATP is correct? 1 The energy for production of ATP from ADP comes directly from a gradient of electrons across the inner mitochondrial membrane. 2 Oxygen participates directly in the reaction that makes ATP from ADP and P. 3 The chemiosmotic synthesis of ATP requires that the electron transport in the inner mitochondrial membrane be coupled to proton transport across the same membrane. 4 The chemiosmotic synthesis of ATP occurs only in eukaryotic cells, because it occurs in mitochondria. 5 Chemiosmotic ATP synthesis requires oxygen.
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Which statement about the citric acid cycle is correct? 1. The citric acid cycle oxidizes glucose to carbon dioxide. 2 The citric acid cycle produces most of the ATP that is subsequently used by the electron transport chain. 3 The citric acid cycle depends on the availability of NAD+, which is a product of glycolysis. 4 The last reaction in the citric acid cycle produces a product that is a substrate for the first reaction of the citric acid cycle. 5 The oxidation of compounds by the citric acid cycle requires molecular oxygen.
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Which of the following statements about the electron transport chain is NOT correct
A It is located in the inner mitochondrion membrane
B Cytochrome c accepts electrons from complex I
C Cytochrome oxidase (complex IV) accepts electrons from Cytochrome c
D Coenzyme Q accepts electrons from complex I and complex II
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Which of the following steps in cellular respiration is associated with release of maximum number of ATP molecules?
A Glycolysis
B Kreb’s cycle
C Oxidative phosphorylation
D Reduction of NADP
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