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. FAD +or $FAD{H}_2$

Answer 1

The correct option is B ATP

The given diagram is a graphical representation of aerobic respiration process, where pathway A is glycolysis, pathway B is Krebs cycle and pathway C is ETS.
1 to 12 represent the chemicals that are consumed and that are produced duing these patways. They are-
1 - ATP
2 - Pyruvate
3 - NADH
4 - ATP
5 - Acetyl CoA
6 - NADH
7 - FADH2
8 - ATP
9 - Oxygen
10 - ADP
11 - Water
12 - ATP
Thus 4, 8 and 12 are ATP that are generated during each of the pathways.