Exam 9: Cellular Respiration: Harvesting Chemical Energy

Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. -Which step involves an endergonic reaction?

Figure 9.3 -Which of the following occurs in the cytosol of a eukaryotic cell?

Figure 9.3 -When muscle cells are oxygen deprived, the heart still pumps. What must the heart cells be able to do?

Figure 9.3 -Which of the following couples chemiosmosis to energy storage?

Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. -Starting with one molecule of glucose, the "net" products of glycolysis are

Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following questions. -What is proton-motive force?

When a molecule of NAD+ (nicotinamide adenine dinucleotide)gains a hydrogen atom (not a hydrogen ion)the molecule becomes

Figure 9.3 -Which metabolic pathway is common to both cellular respiration and fermentation?

The molecule that functions as the reducing agent (electron donor)in a redox or oxidation-reduction reaction

Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following questions. -When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is the

Use the following to answer the following questions. Exposing inner mitochondrial membranes to ultrasonic vibrations will disrupt the membranes. However, the fragments will reseal "inside out." These little vesicles that result can still transfer electrons from NADH to oxygen and synthesize ATP. If the membranes are agitated still further however, the ability to synthesize ATP is lost. -After the first disruption, when electron transfer and ATP synthesize still occur, what must be present?

Figure 9.3 -The graph here shows the pH difference across the inner mitochondrial membrane over time in an actively respiring cell. At the time indicated by the vertical arrow, a metabolic poison is added that specifically and completely inhibits all function of mitochondrial ATP synthase. Draw what you would expect to see for the rest of the graphed line.

Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. -Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed during glycolysis?

Figure 9.3 -Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, an early step of glycolysis. In the presence of oxygen, an increase in the amount ATP in a cell would be expected to

Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following questions. -During aerobic respiration, electrons travel downhill in which sequence?

Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. -Which step consists of a phosphorylation reaction in which ATP is the phosphate source?

Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. -In which step is an inorganic phosphate added to the reactant?

Refer to Figure 9.1 to answer the following questions. Figure 9.1 illustrates some of the steps (reactions) of glycolysis in their proper sequence. Each step is lettered. Use these letters to answer the questions. -During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is

Figure 9.3 -Cells do not catabolize carbon dioxide because

Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following questions. -Where are the proteins of the electron transport chain located?