Even though plants carry on photosynthesis, plant cells still use their mitochondria for oxidation of pyruvate. When and where will this occur?
A) in photosynthesizing cells in the light and in other tissues in the dark
B) in nonphotosynthesizing cells only
C) in photosynthetic cells in the light, while photosynthesis occurs concurrently
D) in cells that are storing glucose only
E) in all cells all the time
Answer: E
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AP Biology Chapter 7
- When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs?
- For each mole of glucose (C6H12O6) oxidized by cellular respiration, how many moles of CO2 are released in the citric acid cycle (see Figure 7.1)?
- Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absent?
- Brown fat cells produce a protein called thermogenin in their mitochondrial inner membrane. Thermogenin is a channel for facilitated transport of protons across the membrane. What will occur in the brown fat cells when they produce thermogenin?
- The direct energy source that drives ATP synthesis during respiratory oxidative phosphorylation in eukaryotic cells is
- Where do the catabolic products of fatty acid breakdown enter into the citric acid cycle?
- During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level?
- The final electron acceptor of the electron transport chain that functions in aerobic oxidative phosphorylation is
- When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is
- What carbon sources can yeast cells metabolize to make ATP from ADP under anaerobic conditions?
- Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon dioxide (CO2) and water?
- Starting with one molecule of glucose, the energy-containing products of glycolysis are
- Which of the following statements describes the results of this reaction? C6H12O6 + 6 O2 6 CO2 + 6 H2O+ Energy
- Which of the protein complexes labeled with Roman numerals in Figure 7.2 will transfer electrons to O2?
- What is the oxidizing agent in the following reaction? Pyruvate+ NADH + H+ Lactate+ NAD+
- Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis?
- When an individual is exercising heavily and when the muscle becomes oxygen-deprived, muscle cells convert pyruvate to lactate. What happens to the lactate in skeletal muscle cells?
- Most CO2 from catabolism is released during
- How many oxygen molecules (O2) are required each time a molecule of glucose (C6H12O6) is completely oxidized to carbon dioxide and water via aerobic respiration?
- If pyruvate oxidation is blocked, what will happen to the levels of oxaloacetate and citric acid in the citric acid cycle shown in Figure 7.1?
- During aerobic respiration, electrons travel downhill in which sequence?
- What fraction of the carbon dioxide exhaled by animals is generated by the reactions of the citric acid cycle, if glucose is the sole energy source?
- The Immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is the
- Approximately how many molecules of ATP are produced from the complete oxidation of two molecules of glucose (C6H12O6) in aerobic cellular respiration?