Question

The energy-releasing process in which the
substrate is oxidised without an external electron
acceptor is called
(a) fermentation (b) photorespiration
(c) aerobic respiration (d) glycolysis

Answer 1

The energy-releasing process in which the substrate is oxidised without an external electron acceptor is called fermentation

• Option (a) is correct.
• The fermentation is an incomplete oxidation of glucose under anaerobic condition.
• In this process pyruvic acid is converted to carbon-di-oxide and ethanol, which do not involve electron transport chain.

Answer 2

The energy-releasing process in which the  substrate is oxidised without an external electron  acceptor is called fermentation.

Option (A) is correct.

Explanation:

Fermentation is an anaerobic process.

This process takes place in certain bacteria and fungi which do not involve electron transport chain.

In this process, substrate level phosphorylation takes place in glycolysis.

This glycolysis occurs in steps and produces 2 ATP molecules.

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What is electron transport system  ?

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