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Q: If cytoplasmic ATP concentration is high, and the extracellular H+ concentration is low, then

Q: If cytoplasmic ATP concentration is high, and the extracellular H+ concentration is low, then. ATP synthase will synthesize ATP at a slower rate ATP synthase will synthesize ATP at a faster rate ATP synthase will hydrolyze ATP and pump protons out of the cell

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Q: If cytoplasmic ATP concentration is high, and the extracellular H+ concentration is low, then

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  1. Q: If cytoplasmic ATP concentration is high, and the extracellular H+ concentration is low, then • ATP synthase will synthesize ATP at a slower rate • ATP synthase will synthesize ATP at a faster rate • ATP synthase will hydrolyze ATP and pump protons out of the cell • ATP synthase will hydrolyze ATP and pump protons into the cell

  2. When a marshmallow catches fire and burns (C6H12O6 + 6O2 6CO2 + 6 H2O), • The carbon atoms of sugar are reduced • The hydrogen atoms of sugar are reduced • Molecular oxygen is reduced • All of the above • None of the above

  3. Heating the marshmallow • Made the G of the glucose oxidation reaction more negative • Lowered the activation energy barrier for the glucose oxidation reaction • Acted as a catalyst for the glucose oxidation reaction • Provided the activation energy required for the glucose oxidation reaction

  4. In cells, the pathway of electrons is • From food to the electron transport chain to NAD+ to oxygen • From oxygen to the electron transport chain to NAD+ to food. • From food to NAD+ to the electron transport chain to ATP synthase • From food to NAD+ to the electron transport chain to the terminal electron acceptor • From food to NAD+ to the electron transport chain to ADP

  5. Q: An organism that gets electrons from H2 and makes its own organic carbon from carbon dioxide is classified as a: • Chemoheterotroph • Chemoautotroph • Photoheterotroph • Photoautotroph

  6. Q: Which of the following would NOT have been a possible energy-harvesting pathway for the LUCA? a. Organic molecules as electron donor, sulfate as electron acceptor b. Organic molecules as electron donor, oxygen as electron acceptor c. H2 as electron donor, Fe+3 as electron acceptor

  7. Q: Oxidative phosphorylation occurs in • All cells in the presence of oxygen • Only in mitochondria in the presence of oxygen • Only in mitochondria, using either oxygen or alternative electron acceptors • All respiring cells, using either oxygen or alternative electron acceptors • All respiring cells, except Archaea

  8. Microbial fuel cells – bioelectrical energy Oxic zone Anoxic layer

  9. What metabolic processes are microbes at the anode using to make most of their ATP? • Aerobic respiration • Oxidative phosphorylation • Anaerobic respiration • Both a) and b) • Both b) and c)

  10. What is the ultimate source of the electrons collected by the anode? • Organic molecules used as food by the bacteria • Water • Oxygen • Carbon dioxide

  11. The electron transport chain in bacteria is located • In their mitochondrial inner membranes • In their mitochondrial outer membranes • On their plasma membranes • In the cytoplasm • In the nucleoid

  12. Which reagents added to the mud around the anode would boost electricity output? • Oxygen • More organic food molecules • More terminal electron acceptors such as sulfate • More protons (lower pH) • A microbicide (antibiotic)

  13. Can eukaryotic cells generate electric current in this kind of microbial fuel cell?

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