Most CO2 from catabolism is released during
A) oxidative phosphorylation.
B) glycolysis.
C) lactate fermentation.
D) electron transport.
E) the citric acid cycle.
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?
- Even though plants carry on photosynthesis, plant cells still use their mitochondria for oxidation of pyruvate. When and where will this occur?
- 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?
- 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?