Question

Choose the correct answers from the alternatives given :
The carbon dioxide we exhale is produced in

• A. glycolysis
• B. electron transport system
• C. lactate fermentation
• D. Krebs cycle

Answer 1

The correct option is D Krebs cycle

In aerobic respiration three processes occurs out of which two of the processes i.e ; glycolysis and electron transport system does not produce carbon dioxide while in Krebs cycle pyruvate is degraded into molecules of water and carbon dioxide which is obtained by the process of respiration in human beings and is exhaled by humans and animals and is taken up by the plants for the completion of cellular respiration .

So, the correct option is ' Krebs cycle'.