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The energy - releasing metabolic process in which substrate is oxidised without an external electron acceptor is called:
- Option 1)
Glycolysis
- Option 2)
Fermentation
- Option 3)
Aerobic respiration
- Option 4)
Photorespiration
Answers (1)
Lactic acid fermentation -
The incomplete oxidation of pyruvate (from glucose) under anaerobic conditions forming lactic acid by Lactobacillus lactis (bacteria)
- wherein
Enzyme used is lactic acid dehydrogenase
In fermentation, the incomplete oxidation of glucose is achieved under anaerobic conditions by a set of reactions, where pyruvic acid is converted to CO2 and ethanol. The enzyme pyruvic acid, decarboxylase and alcohol dehydrogenase catalyse these reactions. In animals cells also, like muscles during exercise, where oxygen is inadequate for cellular respiration, pyruvic acid is reduced to lactic acid by lactate dehydrogenase. The reducing agent is NADH + H+.
Option 1)
Glycolysis
Incorrect Option
Option 2)
Fermentation
Correct Option
Option 3)
Aerobic respiration
Incorrect Option
Option 4)
Photorespiration
Incorrect Option
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