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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
Option: 1
$NADPH$

Option: 2
$ATP$

Option: 3
$FADH_{2}$ $H_{_{2}}O$

Option: 4
$FAD^{+}$ or $FADH_{2}$

Answers (1)

best_answer

Pathway A is glycolysis, pathway B is the Krebs 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 - $FADH_{2}$ and $NADH$ (either one can be 6 or 7)

Arrow 8 - $ATP$ or $CO_{2}$

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)

Hence, the correct answer is option 2.

Posted by

Shailly goel

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