Fate of Pyruvic Acid
Discussion on the different metabolic fates of pyruvate, including its entry into aerobic respiration or anaerobic fermentation.
What is Fate of Pyruvic Acid?
A three-carbon organic acid that is the end product of glycolysis.
Key points
- Describe the two main pathways for pyruvic acid metabolism.
- Differentiate between aerobic respiration and anaerobic fermentation.
- Identify the end products of lactic acid and alcoholic fermentation.
- Explain the significance of NAD+ regeneration in fermentation.
Common exam trap
Confusing the end products of lactic acid and alcoholic fermentation.
Definitions
- Term
Pyruvic Acid
- Meaning
A three-carbon organic acid that is the end product of glycolysis.
- Term
Aerobic Respiration
- Meaning
A metabolic process that uses oxygen to break down glucose and other fuel molecules to produce ATP.
- Term
Anaerobic Respiration
- Meaning
A metabolic process that produces ATP in the absence of oxygen, often involving fermentation.
- Term
Fermentation
- Meaning
An anaerobic process that converts pyruvic acid into simpler organic compounds, regenerating NAD+.
- Term
Lactic Acid Fermentation
- Meaning
A type of fermentation where pyruvic acid is converted to lactic acid.
- Term
Alcoholic Fermentation
- Meaning
A type of fermentation where pyruvic acid is converted to ethanol and carbon dioxide.
Learning objectives
Describe the two main pathways for pyruvic acid metabolism.
Differentiate between aerobic respiration and anaerobic fermentation.
Identify the end products of lactic acid and alcoholic fermentation.
Explain the significance of NAD+ regeneration in fermentation.
Prerequisites
Glycolysis
Cellular Respiration
Mitochondria
ATP
NAD+
Common mistakes
Confusing the end products of lactic acid and alcoholic fermentation.
Forgetting that fermentation is an anaerobic process.
Not understanding the role of NAD+ regeneration in fermentation.
Assuming fermentation produces a large amount of ATP.
Keywords
Pyruvic acid
Glycolysis
Aerobic respiration
Anaerobic respiration
Fermentation
Lactic acid
Ethanol
Carbon dioxide
NAD+
Mitochondria
Cytoplasm
Practice preview
Under anaerobic conditions, pyruvic acid is converted to lactic acid in:…
easy
Which of the following statements is TRUE regarding the fate of pyruvic acid?…
easy
The end product of anaerobic respiration in yeast is:…
easy