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Questions and Answers
What is the net gain of ATP from glycolysis?
What is the net gain of ATP from glycolysis?
- 1 ATP
- 6 ATP
- 4 ATP
- 2 ATP (correct)
Into how many molecules of pyruvate is one glucose molecule broken down during glycolysis?
Into how many molecules of pyruvate is one glucose molecule broken down during glycolysis?
- 3
- 2 (correct)
- 4
- 1
How many ATP are directly produced from two cycles of the citric acid cycle?
How many ATP are directly produced from two cycles of the citric acid cycle?
- 4
- 1
- 3
- 2 (correct)
What are NADH and FADH2 used for in oxidative phosphorylation?
What are NADH and FADH2 used for in oxidative phosphorylation?
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How many ATP molecules can be produced during oxidative phosphorylation?
How many ATP molecules can be produced during oxidative phosphorylation?
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Study Notes
ATP Production from Glucose
- Cells produce ATP from glucose in 3 main stages.
Stage 1: Glycolysis
- One glucose molecule breaks down into two pyruvate molecules.
- This process produces a net gain of 2 ATP.
Stage 2: Citric Acid Cycle
- Each pyruvate is broken down in a cycle that must turn twice for each glucose molecule.
- Two cycles produce 2 ATP directly and create NADH + FADH2.
Stage 3: Oxidative Phosphorylation
- NADH + FADH2 are used in electron transport chains.
- This stage can produce up to 34 ATP by using energy from electrons to create a proton gradient, which activates ATP synthase.
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Description
This quiz covers the 3 main stages of ATP production from glucose in cells, including glycolysis, citric acid cycle, and oxidative phosphorylation.
