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Questions and Answers
What is the primary function of glycolysis in cellular metabolism?
What is the primary function of glycolysis in cellular metabolism?
- To synthesize fatty acids from acetyl-CoA
- To perform oxidative phosphorylation
- To convert glucose into pyruvate while generating ATP (correct)
- To produce glucose from pyruvate
Which of the following molecules is an immediate product of glycolysis?
Which of the following molecules is an immediate product of glycolysis?
- Pyruvate (correct)
- Lactate
- Glucose-6-phosphate
- Acetyl-CoA
How many ATP molecules are net produced in the glycolysis process from one molecule of glucose?
How many ATP molecules are net produced in the glycolysis process from one molecule of glucose?
- 0 ATP
- 2 ATP (correct)
- 6 ATP
- 4 ATP
Which enzyme catalyzes the first step of glycolysis?
Which enzyme catalyzes the first step of glycolysis?
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What is the fate of pyruvate in anaerobic conditions after glycolysis?
What is the fate of pyruvate in anaerobic conditions after glycolysis?
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Study Notes
Glycolysis Overview
- Glycolysis is a fundamental metabolic pathway that converts glucose into pyruvate, generating energy for cellular functions.
- It occurs in the cytoplasm of the cell and is the first step in both aerobic and anaerobic respiration.
Immediate Product
- The immediate product of glycolysis is pyruvate.
ATP Yield
- The net production of ATP from one molecule of glucose during glycolysis is two ATP molecules, considering the two ATPs consumed and four ATPs produced.
Key Enzyme
- The enzyme that catalyzes the first step of glycolysis is hexokinase, which phosphorylates glucose, making it more reactive.
Anaerobic Conditions
- Under anaerobic conditions, pyruvate is converted into lactate in animals (lactic acid fermentation) or into ethanol and carbon dioxide in yeast (alcoholic fermentation), allowing for continued ATP production.
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