Questions and Answers
What is the mitochondrial matrix?
The space inside the inner membrane of a mitochondrion.
What is acetyl CoA?
A molecule formed when pyruvic acid reacts with coenzyme A.
What is the Krebs cycle?
A biochemical pathway that breaks down acetyl CoA, producing CO2, hydrogen atoms, and ATP.
What is citric acid?
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In what part of a mitochondrion does the Krebs cycle occur?
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In what part of a mitochondrion is the electron transport chain located?
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What four-carbon compound is regenerated at the end of the Krebs cycle?
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What molecule does oxygen become a part of at the end of the electron transport chain?
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Is cellular respiration more efficient than fermentation?
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List the two processes that together result in cellular respiration.
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Study Notes
Mitochondrial Functions
- The mitochondrial matrix is the region located inside the inner membrane of mitochondria where metabolic reactions occur.
- Acetyl CoA is formed when pyruvic acid entering the mitochondrial matrix reacts with coenzyme A.
Krebs Cycle
- The Krebs cycle, also known as the citric acid cycle, is a critical biochemical pathway that processes acetyl CoA to produce carbon dioxide (CO2), hydrogen atoms, and adenosine triphosphate (ATP).
- The cycle begins with the combination of acetyl CoA and oxaloacetic acid, leading to the formation of a six-carbon compound known as citric acid.
Locations of Cellular Processes
- The Krebs cycle takes place in the mitochondrial matrix, where various enzymatic reactions occur.
- The electron transport chain, responsible for electron transfer reactions and ATP production, is found in the inner mitochondrial membrane.
Cycle Regeneration and Products
- At the conclusion of the Krebs cycle, oxaloacetic acid is regenerated, allowing the cycle to continue functioning efficiently.
- At the end of the electron transport chain, oxygen is utilized to combine with hydrogen, forming water as a byproduct.
Comparison of Respiration Processes
- Cellular respiration is a more efficient process for energy production compared to fermentation, enabling organisms to utilize glucose fully in the presence of oxygen.
- Cellular respiration encompasses two main processes: glycolysis and aerobic respiration, essential for generating energy in cells.
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Description
Test your knowledge of key terms in Biology Section 7-2 with these flashcards. This section covers essential concepts such as the mitochondrial matrix, acetyl CoA, and the Krebs Cycle. Perfect for students looking to reinforce their understanding of cellular respiration.
