Question

During aerobic cycle how many metabolic steps release $O_2$?

• A. One
• B. Twelve
  
• C. Six
• D. None of the above
  

Answer 1

Answer: (D)

None of the above

The three processes are involved in the anaerobic respiratory process, glycolysis, Calvin cycle and electron transport chain. There are no steps where the oxygen molecule is released. The oxygen molecule is used for the breakdown through oxidation of the carbohydrate. There is release if the carbon dioxide molecule in this process.

Thus, the correct answer is option D.