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. $Fa{D}^{+}orFAD{H}_2$

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)