Before entering the respiratory pathway,amino acids are:

Which of the following biological molecules is common in the respiratory breakdown of fats,carbohydrates,and proteins?

Maximum amount of energy/$ATP$ is liberated on the oxidation of:

$A-$ Breaking down processes within the living organism is anabolism and synthesis is catabolism.
$R-$ The proteins would be degraded by proteases and the individual amino acids (after deamination) depending on their structure would enter the pathway at some stage within the Kreb's cycle or even as pyruvate or acetyl $CoA$.

The following figure shows an amphibolic pathway. What are $P$,$Q$,and $R$?

The $Cori$ cycle is not found in muscles required for contraction at a slow pace and for a prolonged duration. Which organs does the $Cori$ cycle involve?