Q. 24.0( 173 Votes )
What are the different ways in which glucose is oxidized to provide energy in various organisms?
Glucose is a six carbon molecule that is metabolised in different ways.
In different organisms, glusoce is broken down in the cytoplasm first giving rise to pyruvate which is a three carbon molecule.
This pyruvate will now be utilised differently by different organisms.
There are three pathways of glucose breakdown:
3. Lack of oxygen
- Takes place when oxygen is absent.
- Pyruvate gets converted into ethanol and carbon dioxide.
- Example: Yeast during fermentation.
- Takes place in the prsence of oxygen.
- Pyruvate is broken down into carbon dioxide and water.
- Higher amoung of energy produced.
- Example: In mitochondria.
- This state may be reached due to vigorous activity.
- Oxygen is lacking and pyruvate gets converted into Lactic acid.
- Accumulation of lactic acid leads to muscle cramps.
- Example: In human muscle cells.
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