Questions and Answers
What are the three steps of cellular respiration?
Where does glycolysis occur?
Cytoplasmic fluid of the cell
How does glycolysis begin respiration?
By breaking glucose into two molecules of pyruvate
Where does the citric acid cycle take place?
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What does the citric acid cycle do?
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What is the main function of glycolysis and the citric acid cycle?
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What does oxidative phosphorylation involve?
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What is the purpose of NADH and FADH2?
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When is most of the ATP produced by cellular respiration generated?
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What couples the electron transport chain to ATP synthesis?
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Where does glycolysis occur?
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Study Notes
Overview of Cellular Respiration
- Cellular respiration comprises three main stages: Glycolysis, Citric Acid Cycle, and Oxidative Phosphorylation.
Glycolysis
- Takes place in the cytoplasmic fluid of the cell, outside any organelles.
- Initiates respiration by breaking down glucose into two pyruvate molecules, each containing three carbon atoms.
- Supplies electrons for the subsequent stage of respiration.
Citric Acid Cycle
- Occurs within the mitochondria.
- Completes the glucose breakdown by converting a pyruvate derivative into carbon dioxide.
Oxidative Phosphorylation
- Involves the electron transport chain coupled with chemiosmosis.
- Major generator of ATP during cellular respiration, utilizing energy from the flow of electrons from NADH and FADH2 to oxygen to phosphorylate ADP.
Role of NADH and FADH2
- Act as electron shuttles, transporting electrons to the electron transport chain found in the inner mitochondrial membrane.
ATP Production
- Most ATP produced through cellular respiration is generated during oxidative phosphorylation, taking advantage of high-energy electron transfers.
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Description
Test your knowledge on the three main stages of cellular respiration, including glycolysis, the citric acid cycle, and oxidative phosphorylation. This quiz will cover where glycolysis occurs and its role in the respiration process.
