Maximum energy can be obtained from the oxidation of which respiratory substrate?

$A-$ 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 link between glycolysis,the Krebs cycle,and the $\beta$-oxidation of fatty acids/carbohydrate and fat metabolism is ...........

Which of the following links carbohydrate and fat metabolism?

From the oxidation of one molecule of palmitic acid (fatty acid),the number of $ATP$ molecules gained as net are

Why is the respiratory pathway referred to as an amphibolic pathway?