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Questions and Answers
What is the primary function of NADH and FADH2 in cellular respiration?
What is the primary function of NADH and FADH2 in cellular respiration?
During glycolysis, what happens to a molecule of glucose?
During glycolysis, what happens to a molecule of glucose?
Which of the following statements about glycolysis is true?
Which of the following statements about glycolysis is true?
What is the net ATP gain from one molecule of glucose during glycolysis?
What is the net ATP gain from one molecule of glucose during glycolysis?
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Which process follows glycolysis if oxygen is present?
Which process follows glycolysis if oxygen is present?
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What happens to the electrons during oxidation?
What happens to the electrons during oxidation?
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Which statement best describes reduction in a redox reaction?
Which statement best describes reduction in a redox reaction?
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In the reaction NAD+ + 2e + 2H+ → NADH + H+, what role does NAD+ play?
In the reaction NAD+ + 2e + 2H+ → NADH + H+, what role does NAD+ play?
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Which stage of cellular respiration occurs in the cytosol?
Which stage of cellular respiration occurs in the cytosol?
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What is produced as a result of the oxidation of glucose?
What is produced as a result of the oxidation of glucose?
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Which process directly involves ATP synthase?
Which process directly involves ATP synthase?
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What does the acronym 'LEO' in redox reactions represent?
What does the acronym 'LEO' in redox reactions represent?
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In terms of ATP generation, what distinguishes substrate-level phosphorylation from oxidative phosphorylation?
In terms of ATP generation, what distinguishes substrate-level phosphorylation from oxidative phosphorylation?
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Study Notes
Redox Reactions
- Redox reactions transfer electrons between molecules.
- Oxidation is the loss of electrons, and reduction is the gain of electrons.
- Redox reactions are always coupled; when one molecule loses electrons (is oxidized), another molecule gains electrons (is reduced).
- LEO the lion says GER (Lose Electrons = Oxidation, Gain Electrons = Reduction)
- H+ transfer often represents electron transfer.
Cellular Respiration
- Cellular respiration is the oxidation of glucose, releasing energy to produce ATP.
- Three stages:
- Glycolysis
- Pyruvate oxidation and Citric Acid Cycle
- Oxidative Phosphorylation
ATP Production
- Two ways to make ATP:
- Substrate-level phosphorylation: An enzyme transfers a phosphate from a substrate to ADP to make ATP.
- Oxidative phosphorylation: ATP synthase uses energy from electron carriers (NADH and FADH2) to make ATP.
Glycolysis
- Universal metabolic process occurring in the cytosol.
- Oxidizes glucose (6 carbons) into two molecules of pyruvate (3 carbons each).
- Generates ATP and NADH.
- Anaerobic process (doesn't require oxygen).
- Two phases:
- Energy investment phase (requires initial ATP investment)
- Energy liberation phase (creates ATP and NADH)
- Net gain of 2 ATP per glucose molecule.
- Produces 2 NADH and 2 pyruvate molecules.
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Description
Explore the essential concepts of redox reactions and cellular respiration in this quiz. Learn how electrons are transferred between molecules and how glucose oxidation plays a crucial role in ATP production. Test your understanding of glycolysis, oxidative phosphorylation, and more.
