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
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B
ATP
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C
H2O
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D
FAD +or FADH2
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Solution
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.