### Neet Solved Paper 2013 Question 18

##### Question: The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows numbered 4, 8 and 12 can all be

#### Options:

A) NADH

B) ATP

C) $ H _2O $

D) $ FA{D^{+}}orFADH _2 $

## Show Answer

#### Answer:

Correct Answer: B

#### Solution:

Pathway A is glycolysis, pathways 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 - 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 - H2O and ATP (either one can be 11 or 12)