Which of the following statements describes the end step for the electron transport chain? A. H+ ions flow down the gradient to generate ATP B. electrons are transferred to NADH and FADH2 for chemiosmosis C. electrons are transferred to oxygen, causing it to split and take up H+ ions, which form water D. H+ are pumped across the inner membrane of mitochondria to establish an electrochemical gradient

Which of the following statements describes the end step for the electron transport chain? A. H+ ions flow down the gradient to generate ATP B. electrons are transferred to NADH and FADH2 for chemiosmosis C. electrons are transferred to oxygen, causing it to split and take up H+ ions, which form water D. H+ are pumped across the inner membrane of mitochondria to establish an electrochemical gradient

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter7: Releasing Chemical Energy

Section: Chapter Questions

Problem 11SA

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Figure 4.15 Cyanide inhibits cytochrome c oxidase, a component of the electron transport chain. If cyanide poisoning occurs, would you expect the pH of the intermembrane space to increase or decrease? What affect would cyanide have on ATP synthesis? Figure 4.15 (a) The electron transport chain is a set of molecules that supports a series of oxidation-reduction reactions. (b) ATP synthase is a complex, molecular machine that uses an H+ gradient to regenerate ATP from ADP. (c) Chemiosmosis relies on the potential energy provided by the H+ gradient across the membrane.
The glucose that enters the glycolysis pathway is split into two molecules of _____. a. ATP b. phosphate c. NADH d. pyruvate
Which of the following statements is most correct? The electron transport chain - A: generates a pH gradient that reduces O2 to H2O B: generates a proton gradient across the outer mito membrane C: generates a proton gradient across the inner mito membrane D: uses the energy stored in high energy electron carriers to synthesize ATP E: establishes a membrane potential across the outer mito membrane
Which of the following statements about the generation of ATP in the electron transport chain is correct? a. The generation of ATP from ADP coupled to electron transfer occurs by substrate level phosphorylation as in glycolysis. b. ATP synthase generation of ATP involves a rotating structure inside the inner mitochondrial membrane. c. ATP synthase generation of ATP involves a rotating structure outside the inner mitochondrial membrane. d. Electron transport generates a proton gradient across the outer mitochondrial membrane.
Which of the following statements is TRUE of the electron transport chain (ETC)? A. The movement of electrons down the ETC drives the formation of a proton (H+) gradient. B. The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC. C. The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase. D. The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the ETC.
Which of the following is NOT true of the electron transport chain? a. It produces NADH, as a result of electrons being transferred from glucose to NAD+ b. End products include CO2, water, and pyruvate c. It allows for the controlled release of energy for ATP synthesis d. It is part of the oxidative phosphorylation process
Which of the following statements is a lie?Select one:a.Specific enzymes in the electron transport chain are unaffected by feedback inhibition.b.Elevated levels of ADP will increase pathway activity in the electron transport chain.c.The rate of transport of electrons through the electron transport chain is regulated by feedback inhibition.
CHOOSE THE CORRECT LETTER Which of the following conditions promote the synthesis of ATP through the electron transport chain?A.proton pump from outer mitochondrial membrane to inner mitochondrial membraneB. proton pump from matrix to inner mitochondrial membraneC. proton pump from inner mitochondrial membrane to outer mitochondrial membraneD. proton pump from inner mitochondrial membrane to matrix
During cellular respiration, which of the following diffuses through ATP synthase? A)Phosphates B)Electrons C)Carbon dioxide (CO2) D)Protons (H+ ions) E)ATP 15
Which one of the following best describes the electron transport chain? Electrons are passed from one carrier to another releasing a little energy at each step Electrons are pumped across a membrane by active transport Glucose is broken down to a three-carbon compound in preparation for the citric acid cycle Hydrogen atoms are added to CO2 to make an energy-rich compound Acetyl CoA is fully oxidized to CO2
Which of the following statements is a lie? Select one: a.The continuous pumping of hydrogen ions creates a higher H+ concentration in the matrix inside the mitochondria compared to the concentration in the intermembrane space. b.There are four sets of enzyme complexes labeled with roman numerals I to IV that as a whole is referred to as the Electron Transport Chain (ETC). c.The last electron acceptor is the oxygen ion which is reduced to form water after the process.
Which of the following correctly describes where each process takes place in eukaryotic cells? a. conversion of pyruvate to acetyl CoA – mitochondrial matrix b. glycolysis – mitochondrial matrix c. ATP synthase – ATP synthesized in cytosol using proton motive force d. electron transport chain – electron carrier proteins embedded in outer mitochondrial membrane e. citric acid cycle – cytosol