Which is NOT true of chemiosmosis? a. In mitochondria, it is maintained by a proton gradient created from the electron transport chain b. It refers to the flow of H+ across a membrane c. It powers ATP synthesis in mitochondria, chloroplasts, and prokaryotic cells d. It occurs in the citric acid cycle, producing water from an enzymatic reaction

Which is NOT true of chemiosmosis? a. In mitochondria, it is maintained by a proton gradient created from the electron transport chain b. It refers to the flow of H+ across a membrane c. It powers ATP synthesis in mitochondria, chloroplasts, and prokaryotic cells d. It occurs in the citric acid cycle, producing water from an enzymatic reaction

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter7: Releasing Chemical Energy

Section: Chapter Questions

Problem 15SA: Match the terms with the best description. ___ mitochondrial matrix a. needed for glycolysis ___...

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In an anaerobic environment, facultative anaerobes use what kind of pathway to produce ATP? A.Krebs cycle and fermentation b.Glycolysis and fermentation c.Photosynthesis and the Calvin Benson cycle d. Krebs cycle and oxidative phosphorylation Why is free oxygen toxic to obligate anaerobes? A.They produce catalase and superoxide dismutase. B.They use fermentation pathways rather than oxidative phosphorylation to produce ATP. C.They do not produce the right enzymes to degrade oxygen radicals. D.They cannot use oxygen as the final electron acceptor in respiration. You are subculturing an obligate anaerobe from a tube of thioglycolate media. How far down do you dip the inoculating loop to retrieve the bacteria? A.All the way to the bottom of the media. B.Just into the top of the media C.Anywhere in the media is fine. D.Into the middle of the media
What fundamental structure organization allows both chloroplasts and mitochondria to establish a chemiosmotic gradient? a. Phospholipid bilayer b. Double membrane c. Electron transport chain d. Cytochrome complex
Which do the electron transport chains of mitochondria and chloroplasts have in common? A. oxygen as an electron donor B. water as an electron acceptor C. use of a hydrogen ion gradient D. one main membrane protein pump
Why is oxygen important in aerobic cellular respiration? a. Without oxygen, the Citric acid cycle will be disrupted b. Oxygen is the final electron acceptor during the electron transport chain c. they produce carbon dioxide and water d. It provides electrons during cellular respiration
Which step of the cellular respiration pathway can take place in the absence of oxygen? A.Glycolysis B.Kreb’scycle C.Electron transport chain D.Fermentation
During glycolysis, pyruvate oxidation, and the citric acid cycle, NADH is produced. The citric acid cycle also produces FADH2. What is the purpose of these molecules? a. to produce carbon dioxide to breathe out b. to produce oxygen that is needed for the electron transport chain c. to carry electrons to the electron transport chain d. to provide the ADP and phosphate that are needed to make ATP
What are NADH and FADH2? a. Oxidized coenzymes which carry electrons b. energy-producing organelles c. short-term, socially popular sources of hydrogen gas d. Reduced coenzymes which carry electrons
Where in the cell does glycolysis occur? A. on the outer mitochondrial membrane B. in the endoplasmic reticulum C. in the cytoplasm D. in the fluid of the mitochondria
Which statement about the light reactions of photosynthesis and cellular respiration is correct? a. Both reactions occur in the cell cytoplasm b. plants do not require mitochondria because they produce ATP via photosynthesis c. ATP is produced as a result of the actions of an electron transport chain in both processes d. Light reactions and cellular respiration produce the same waste products e. the final electron acceptor in the light reactions is oxygen
How does cellular respiration differ in prokaryotes and eukaryotes? A. Eukaryotes perform reactions in mitochondria; prokaryotes use the plasma membrane. B. Eukaryotes use substrate-level ATP synthesis; prokaryotes use oxidative phosphorylation. C. Eukaryotes do not use oxygen; prokaryotes only use oxygen. D. Eukaryotes use NAD+/NADH as electron acceptors; prokaryotes use FAD+/FADH2.
If you ran a molecule through each of these processes, when would the MOST reduced carbon compound be found? A. Start of glycolysis B. Start of electron transport chain C. End of chemiosmosis D. End of citric acid cycle
How would a ubiquinone inhibitor directly affect the ATP yield? a. By increasing the electron transport rate to a fraction of 1/2 b. By limiting the hydrogen protons pumped to a fraction of 1/4 c. By pumping additional hydrogen protons to a fraction of 1/2 d. By disabling the entire electron transport chain and chemiosmotic system

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	a.	In mitochondria, it is maintained by a proton gradient created from the electron transport chain
	b.	It refers to the flow of H⁺ across a membrane
	c.	It powers ATP synthesis in mitochondria, chloroplasts, and prokaryotic cells
	d.	It occurs in the citric acid cycle, producing water from an enzymatic reaction