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Questions and Answers
What is the molecule that initiates the Citric acid cycle in the mitochondria?
What is the molecule that initiates the Citric acid cycle in the mitochondria?
- Lactic acid
- Glucose
- Acetyl-CoA (correct)
- Pyruvate
Where does the Citric acid cycle take place?
Where does the Citric acid cycle take place?
- Endoplasmic reticulum
- Cytoplasm
- Mitochondrial matrix (correct)
- Nucleus
How many ATP molecules are produced for every acetyl-CoA molecule that enters the Citric acid cycle?
How many ATP molecules are produced for every acetyl-CoA molecule that enters the Citric acid cycle?
- 1 ATP (correct)
- 4 ATP
- 2 ATP
- 3 ATP
What are the low-energy state sensors that activate the Citric acid cycle?
What are the low-energy state sensors that activate the Citric acid cycle?
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Study Notes
Citric Acid Cycle Overview
- The molecule that initiates the Citric Acid Cycle is Acetyl-CoA, derived from carbohydrates, fats, and proteins.
- The Citric Acid Cycle occurs in the mitochondria, specifically in the mitochondrial matrix, which is the innermost compartment of the mitochondria.
Energy Production
- For each Acetyl-CoA molecule that enters the Citric Acid Cycle, a net yield of 10 ATP molecules is produced through the cycle and associated electron transport chain processes.
Regulatory Mechanisms
- Low-energy state sensors that activate the Citric Acid Cycle include ADP (adenosine diphosphate), AMP (adenosine monophosphate), and calcium ions. These signals indicate a need for energy production, stimulating the cycle's activity.
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