Question

1. Imagine you’re a carbon atom on a carbon dioxide molecule:
   1. In which process were you produced, if you were expired by an animal?

Answer 1

Animals produce carbon dioxide as a byproduct of cellular respiration.

In the process of cellular respiration, sugar like glucose are broken down to produce energy rich molecules called ATP. These molecules are there used by the cell to perform its metabolic activities.

Water is also produced as a byproduct of cellular respiration. It is formed by reduction of oxygen.

Sugar are completely oxidised to form carbon dioxide through a series of processes.

Aerobic respiration takes place in the presence of Oxygen and comprises glycolysis, pyruvic acid oxidation, citric acid cycle and electron transport chain coupled with oxidative phosphorylation.

Anaerobic respiration comprises only glycolysis and fermentation.

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