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. $H_{2}O$
• B. $FAD$ or $FAD{H}_2$
• C. NADH
• D. ATP

Answer 1

The correct option is D ATP

38 ATP molecules are produced during each cycle of cellular respiration. The arrowed numbered 4, 8 and 12 represents the number of ATP produced during each pathways (Glycolysis→Kreb’s cycle) of cellular respiration.

So, the correct option is 'ATP'.