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Questions and Answers
The initial breakdown of glucose into pyruvate occurs in the ___________ of the cell.
The initial breakdown of glucose into pyruvate occurs in the ___________ of the cell.
False
Glycolysis, the Krebs cycle, and the electron transport chain are the three main stages of ___________.
Glycolysis, the Krebs cycle, and the electron transport chain are the three main stages of ___________.
False
Cellular respiration is a metabolic pathway that breaks down ___________ and produces ATP.
Cellular respiration is a metabolic pathway that breaks down ___________ and produces ATP.
False
The Krebs cycle takes place in the ___________ and requires oxygen.
The Krebs cycle takes place in the ___________ and requires oxygen.
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The electron transport chain uses the NADH and FADH2 molecules to generate a ___________ gradient.
The electron transport chain uses the NADH and FADH2 molecules to generate a ___________ gradient.
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Anaerobic respiration requires oxygen for energy production.
Anaerobic respiration requires oxygen for energy production.
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ATP is important for energetically unfavorable reactions in the body.
ATP is important for energetically unfavorable reactions in the body.
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Cellular respiration takes place only in the cytoplasm of the cell.
Cellular respiration takes place only in the cytoplasm of the cell.
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The Krebs cycle occurs in the mitochondria.
The Krebs cycle occurs in the mitochondria.
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Cellular respiration breaks down only glucose for energy production.
Cellular respiration breaks down only glucose for energy production.
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Anaerobic respiration does not require ___________?
Anaerobic respiration does not require ___________?
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Which organelle does glycolysis occur inside?
Which organelle does glycolysis occur inside?
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The Krebs cycle and the electron transport chain occur in the ____________?
The Krebs cycle and the electron transport chain occur in the ____________?
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Cellular respiration breaks down glucose and other organic fuel molecules from ___________, fats, and proteins?
Cellular respiration breaks down glucose and other organic fuel molecules from ___________, fats, and proteins?
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ATP is particularly important for energetically unfavorable reactions that would otherwise not occur, true or false?
ATP is particularly important for energetically unfavorable reactions that would otherwise not occur, true or false?
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Study Notes
Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP, the energy molecule used by the body. The process of cellular respiration can be divided into three main stages: glycolysis, the Krebs cycle, and the electron transport chain.
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Glycolysis: This is the initial breakdown of glucose into pyruvate, which occurs in the cytoplasm of the cell. Glycolysis produces a molecule of ATP and two molecules of NADH, which are used in the electron transport chain.
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Krebs Cycle (also known as the Citric Acid Cycle): This process takes place in the mitochondrial matrix and requires oxygen. The Krebs cycle uses the pyruvate molecules from glycolysis to generate 2 ATP and several molecules of FADH2. The cycle consists of nine enzyme-catalyzed reactions that can be divided into three stages:
- Acetyl CoA binds a four- carbon molecule (oxaloacetate) producing a six- carbon molecule (citrate).
- Two carbons are removed as carbon dioxide.
- The four- carbon starting material is regenerated.
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Electron Transport Chain (ETC): The ETC uses the NADH and FADH2 molecules formed during glycolysis and the Krebs cycle to generate a proton gradient. This gradient ultimately leads to the production of ATP. The ETC takes place in the mitochondrial matrix and requires oxygen.
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Anaerobic Respiration: In the anaerobic conditions, the body uses a different pathway for energy production, called anaerobic respiration. This process does not require oxygen and produces ATP through a different pathway.
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Energy production: The energy produced during cellular respiration is used to support many other reactions in the body. ATP is particularly important for energetically unfavorable reactions that would otherwise not occur.
Cellular respiration takes place in the cytoplasm and mitochondria of each cell of the body. Glycolysis occurs inside the cytoplasm, while the Krebs cycle and the electron transport chain occur in the mitochondria. The process of cellular respiration is a series of chemical reactions that break down glucose and other organic fuel molecules from carbohydrates, fats, and proteins, and diverting the chemical energy in these molecules into ATP
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Description
Test your knowledge about cellular respiration, the metabolic pathway that breaks down glucose to produce ATP. Learn about glycolysis, the Krebs cycle, the electron transport chain, and anaerobic respiration. Understand how energy production in cellular respiration supports various reactions in the body.
