Questions and Answers
What happens during the process of glycolysis?
1 molecule of glucose, a 6-carbon compound, is transformed into 2 molecules of pyruvic acid, a 3-carbon compound.
Which of the following statements about glycolysis are correct? (Select all that apply)
How many ATP molecules does glycolysis produce?
4 ATP molecules with a net gain of 2 ATP molecules.
What role does NAD+ play in glycolysis?
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What are the advantages of glycolysis?
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Study Notes
Overview of Glycolysis
- Glycolysis is the initial stage of cellular respiration, converting glucose into pyruvic acid.
- One glucose molecule (6-carbons) is transformed into two pyruvic acid molecules (3-carbons each).
Key Processes in Glycolysis
- Glucose is broken down into 2 molecules of pyruvic acid, which are necessary for the Krebs cycle.
- During glycolysis, ATP and NADH are generated, contributing to the cell's energy supply.
ATP Production
- Glycolysis requires an initial investment of 2 ATP molecules to initiate the process.
- A total of 4 ATP molecules are produced in glycolysis, yielding a net gain of 2 ATP per glucose molecule.
NADH Production
- The electron carrier NAD+ converts to NADH by accepting high-energy electrons during glycolysis.
- NADH transports these electrons to the electron transport chain, facilitating further ATP production.
- Each glucose molecule entering glycolysis produces 2 NADH molecules.
Advantages of Glycolysis
- Glycolysis rapidly produces ATP, catering to increased energy demands in cells.
- It operates anaerobically (without oxygen), allowing for immediate energy generation when oxygen levels are low.
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Description
This quiz focuses on Chapter 9.2, detailing the process of glycolysis in cellular respiration. Learn how glucose is transformed into pyruvic acid and understand key facts about this vital metabolic pathway.
