Which of the following are stages of electron transfer phosphorylation? Select all that apply. Oxygen collects electrons from the end of the electron transfer chain to combine with hydrogen ions to form water. The electron transfer chain fuels active transport of hydrogen ions from the matrix to the intermembrane space. Hydrogen ion flow through an ATP synthase produces ATP. The NADH and FADH produced in the prior steps of aerobic respiration deliver electrons and hydrogen ions to the electron transfer chain.

Which of the following are stages of electron transfer phosphorylation? Select all that apply. Oxygen collects electrons from the end of the electron transfer chain to combine with hydrogen ions to form water. The electron transfer chain fuels active transport of hydrogen ions from the matrix to the intermembrane space. Hydrogen ion flow through an ATP synthase produces ATP. The NADH and FADH produced in the prior steps of aerobic respiration deliver electrons and hydrogen ions to the electron transfer chain.

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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Which of the following BEST describes the function of the electron transport system? Energy absorbed by the cytochromes in the system is converted to ATP. The system functions to produce ATP by chemiosmosis in the absence of oxygen. Energy lost from high-energy electrons causes the oxidation of glucose. Energy lost from high-energy electrons results in ATP production by chemiosmosis.
Chemiosmosis is a part of oxidative phosphorylation, the final step in cellular respiration. Which of the following is TRUE regarding chemiosmosis? ATP synthesis creates a proton gradient that causes electron flow through an electron transport chain (ETC). A temperature gradient drives ATP synthesis. The energy from a proton gradient is used to make ATP. Chemiosmosis regenerates electron carriers like NADH and FADH2.
Which of the following processes produce the most ATP during aerobic respiration? Group of answer choices Electron transport chain and oxidative phosphorylation Fermentation Substrate level phosphorylation TCA cycle
ATP synthase attaches a phosphate group to ADP, forming ATP .This process requires energy. The energy is provided by electron carrier molecules in the electron transport system that pump ___________into the intermembrane space (also called outer compartment). When these move back into the ___________, they must move through ATP synthase. This movement through ATP synthase provides the power needed by ATP synthase to push the third phosphate group onto ADP. protons (H+ ions); mitochondrial matrix protons; intermembrane space electrons; intermembrance space electrons; mitochondrial matrix
Which of the following is true about substrate level phosphorylation? It involves ATP synthase It involves the transfer of phosphate groups by dehydrogenase enzymes It only occurs in the presence of oxygen It requires energy released from facilitated diffusion of protons down their electrochemical gradient It is used to make ATP during the Calvin cycle
Which of the following statements best explains why anaerobic respiration releases energy from organic compounds Anaerobic respiration partially oxidizes glucose, which is an organic compound This happens during glycolysis The result of the glycolysis is the net production of 2 ATP molecules which are used by the cell for energy Anaerobic respiration partially oxidizes glucose, which is an inorganic compound This happens during glycolysis The result of the glycolysis is the net production of 4 ATP molecules which are used by the cell for energy Anaerobic respiration partially oxidizes glucose, which is an organic compound This happens during glycolysis The result of the glycolysis is the net production of 4 ATP molecules which are used by the cell for energy Anaerobic respiration fully oxidizes glucose, which is an organic compound This happens during glycolysis The result of the glycolysis is the net production of 4 ATP molecules which are used by the cell for energy
Which of the following are true statements regarding cellular respiration? (Select all that apply) Group of answer choices Lactic acid fermentation is an aerobic process The final electron acceptor in the electron transport chain is oxygen Two ATP are produced in the citric acid cycle Glycolysis produces two net molecules of ATP Four ATP are produced in the Krebs cycle
Chemiosmosis is a critical step in ATP production. Indicate which 2 items are true about chemiosmosis Group of answer choices It occurs during oxidative phosphorylation but not photophosphorylation It generates ATP by passing electrons across a semipermeable membrane It is part of the Calvin Cycle It is a catabolic process It is an anabolic process. It is part of the Krebs Cycle It generates ATP by passing protons across a semipermeable membrane
If the bacteria cell plasma membrane was damaged, what step of metabolism would be affected? Formation of NADH and FADH2 in glycolysis and the Krebs cycle. Formation of ATP in glycolysis. Formation of ATP in the Krebs cycle. Establishment of the hydrogen ion gradient in the Electron Transport System. Breakdown of glucose to pyruvic acid during glycolysis.
Which of the following correctly sequences the steps of non-cyclic electron transport? a) Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules b) Electrons donated from water molecules pass through photosystem I then photosystem II before returning to the chlorophyll molecules, generating ATP in the process c) Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions d) The ATP and NADPH generated by the reactions of photosystem II and photosystem I are utilized by the Calvin Cycle to build high energy glucose molecules
Chemiosmosis and the electron transport chain are critical to the generation of ATP for both aerobic and anaerobic respiration. What is happening at this final step in ATP generation? Name the proteins, co-enzymes and enzymes involved.
Which of the following statements concerning oxidative phosphorylation is false? Group of answer choices: The electron transport chain generates an electrochemical gradient that drives the production of ATP. ATP synthase with fewer subunits in its c ring will produce more ATP per proton. A “loose” β subunit of ATP synthase becomes a “tight” site as it produces ATP. When the supply of NADH and QH2 (ubiquinol) decreases, ATP synthase produces more ATP.