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Questions and Answers
Where does glycolysis occur within the cell?
Where does glycolysis occur within the cell?
What is the main product generated at the end of glycolysis?
What is the main product generated at the end of glycolysis?
How many ATP molecules are utilized during the energy-investing phase of glycolysis?
How many ATP molecules are utilized during the energy-investing phase of glycolysis?
What is the first step of glycolysis?
What is the first step of glycolysis?
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What type of phosphorylation takes place during glycolysis?
What type of phosphorylation takes place during glycolysis?
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Study Notes
Glycolysis Overview
- Glycolysis occurs in the cytosol of the cell.
- The main product is two three-carbon molecules of pyruvate.
- A net gain of two ATP molecules is obtained from one glucose molecule during glycolysis.
- Substrate-level phosphorylation is the type of phosphorylation that takes place during glycolysis.
Breakdown of Glucose
- Each glucose molecule is broken down into two pyruvate molecules through glycolysis.
Energy-Investing Phase Steps
- The phase involves a series of reactions to prepare glucose for breakdown:
- Glucose is primed using two ATP molecules.
- Converted to glucose-6-phosphate.
- Rearranged to fructose-6-phosphate.
- Phosphorylated to form fructose-1,6-bisphosphate.
- Fructose-1,6-bisphosphate is cleaved into dihydroxyacetone phosphate (DAP) and glyceraldehyde-3-phosphate (G3P).
- DAP is rearranged to form another G3P, resulting in two G3P molecules.
Key Steps in Glycolysis
- The first step involves ATP transferring a phosphate group to glucose, converting it into glucose-6-phosphate.
- Glucose priming is essential as it converts glucose into a cleavable compound for further breakdown.
ATP Usage
- Two ATP molecules are consumed during the priming phase of glycolysis.
Significant Reaction
- In step four, fructose-1,6-bisphosphate splits into DAP and G3P, marking a crucial moment in the glycolytic pathway.
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Description
Test your knowledge on glycolysis with this quiz that covers its location, key products, and processes involved. Understand how glucose is broken down and the ATP yield during this metabolic pathway. Ideal for students of biology or biochemistry.
