Multiple choice

The overall purpose of glycolysis, Krebs cycle and the electron transport system is the formation of

  1. electron acceptors

  2. ATP in small stepwise units

  3. sugars

  4. nucleic acids

  5. ATP in one large oxidation reaction
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B Correct answer
Explanation

Respiration is an energy-liberating, enzymatically-controlled multistep catabolic process of stepwise breakdown of organic substances (hexose sugar) inside the living cells. Aerobic respiration includes the 3 major processes - glycolysis, Krebs cycle and electron transport chain. The substrate is completely broken down to form CO2 and water. A large amount of energy is released stepwise in the form of ATP.

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