Question

The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products
Arrows numbered 4, 8 and 12 can all be

• A. NADH
• B. ATP
• C. $ {{H}_{2}}O $
• D. $ Fa{{D}^{+}}or\,FAD{{H}_{2}} $

Answer 1

Answer: (B)

Pathway A is glycolysis, pathway B is the krebs cycle and pathway C is oxidative phosphorylation Arrow 1 - $ ADP $ or $ NA{{D}^{+}} $ Arrow 2-Pyruvate Arrow 3 - NADH Arrow 4 - ATP Arrow 5 - $ ADP,NA{{D}^{+}} $ or FAD Arrow 6 and $ 7-FAD{{H}_{2}} $ and NADH (either one can be 6 or 7) Arrow 8 - ATP or $ C{{O}_{2}} $ Arrow 9 and $ 10-{{O}_{2}} $ and ADP (either one can be 9 or 10) Arrow 11 and $ 12-{{H}_{2}}O $ and ATP (either one can be 11 or 12)