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The three boxes in this diagram represent the three major biosynthetic pathways in aerobic net reactant or products


Arrows numbered 4, 8 and 12 can all be

  • NADH

  • ATP

  • H2O

  • FAD+ Or FADH2

Answer

B.

ATP

Pathway A is glycolysis, pathway B is the kerb' cycle and pathway C is oxidative phosphorylation

Arrow 1 - ADP or NAD+

Arrow 2 - Pyruvate


Arrow 3 - NADH

Arrow 4 - ATP

Arrow 5 - ADP, NAD+ or FAD

Arrow 6 and 7 - FADH2 and NADH (either one can be 6 or 7)

Arrow 8 - ATP or  CO2


Arrow 9 and 10 - O2 and ADP (either one can be 9 or 10)

Arrow 11 and 12 - H20 and ATP (either one can be 11 or 12)

Pathway A is glycolysis, pathway B is the kerb' cycle and pathway C is oxidative phosphorylation

Arrow 1 - ADP or NAD+

Arrow 2 - Pyruvate


Arrow 3 - NADH

Arrow 4 - ATP

Arrow 5 - ADP, NAD+ or FAD

Arrow 6 and 7 - FADH2 and NADH (either one can be 6 or 7)

Arrow 8 - ATP or  CO2


Arrow 9 and 10 - O2 and ADP (either one can be 9 or 10)

Arrow 11 and 12 - H20 and ATP (either one can be 11 or 12)