Question

In aerobic respiration,if 38 molecules of ATP are produced,then the number of ATP produced in glycolysis (X), pyruvate to acetyl- CoA (Y) and Krebs cycle (Z) will be

• A. X- 2,Y-6,Z-30
• B. X-8,Y-6,Z-24
• C. X-8,Y-10,Z-24
• D. X-2,Y-12,Z-24

Answer 1

The correct option is A X- 2,Y-6,Z-30

• Glycolysis: (2 ATP)
  

ATP formation by substrate phosphorylation = 4 ATP

ATP consumed in Glycolysis = 2 ATP

• Pyruvate to Acetyl CoA: (2 NADH${}_2$ = 6 ATP)
  
• Kreb's Cycle: (30 ATP)
  

ATP formation by substrate phosphorylation = 2 ATP

ATP formation by oxidative phosphorylation = 28 ATP

So, the correct option is 'A) X- 2, Y - 6 ,Z-30'.