Question

How many molecules of ATP are synthesised, if fructose 1,6 diphosphate undergoes aerobic respiration?

• A. 38
• B. 40
• C. 20
• D. 19

Answer 1

Answer: (B)

40

Cellular respiration includes all metabolic pathways where carbohydrates and other metabolites are broken down to build up ATP. Aerobic cellular respiration includes pathways that require oxygen. Fructose-1,6-bis phosphate can not directly enter into glycolysis. It should convert into glucose which yields 2 ATP molecules. Then this glucose enters into glycolysis and citric acid cycle which yields 38 ATP molecules. So, altogether 40 molecules of ATP are synthesised if fructose 1,6 diphosphate undergoes respiratory cycles. Thus, option B is correct.