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Questions and Answers
Which molecule is NOT transported during glycolysis?
Which molecule is NOT transported during glycolysis?
- ATP
- Pyruvate
- CO2 (correct)
- NADH
Which process occurs in the mitochondria?
Which process occurs in the mitochondria?
- Phosphoglycerate kinase reaction
- Glycolysis
- Electron transport system (correct)
- Lactic acid production
What is the net reaction for glycolysis when pyruvate is shuttled to the mitochondria?
What is the net reaction for glycolysis when pyruvate is shuttled to the mitochondria?
- Glucose + 2ATP + 2NAD+ → 2Pyruvate + 2ADP + 2NADH + 2H2O
- Glucose + 2Pi + 2ADP + 2NAD+ → 2Pyruvate + 2ATP + 2NADH + 2H2O (correct)
- Glucose + 2ADP + 2Pi + 2NADH → 2Pyruvate + 2ATP + 2NAD+ + 2H2O
- Glucose + 2ADP + 2Pi + 2NAD+ → 2Pyruvate + 4ATP + 2H2O
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Study Notes
- In the presence of sufficient oxygen, pyruvate is transported into the mitochondria.
- Two molecules of reduced NADH are also transported during glycolysis.
- Pyruvate is converted to acetyl-CoA in the mitochondria.
- Acetyl-CoA enters the Krebs cycle for ATP resynthesis.
- NADH molecules enter the electron transport system for ATP resynthesis.
- Lactic acid does not cause metabolic acidosis.
- Lactic acidosis is a misnomer.
- Phosphoglycerate kinase reaction of glycolysis involves the transfer of a phosphate leaving a COO- group.
- No proton exists to dissociate from lactate.
- Net reaction for glycolysis when pyruvate is shuttled to the mitochondria is glucose + 2Pi + 2ADP + 2NAD+ → 2Pyruvate + 2ATP + 2NADH + 2H2O.
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