Explain why triacylglycerols should be the principal source of stored metabolic energy.

What are four possible metabolic fates of glucose-6- phosphate?

in the synthesis of glycogen, the glycogen synthase uses UDP-glucose rather than glucose. Explain in detail way.

(b) Biotin is a coenzyme required for a key step in gluconeogenesis. (i) To which enzyme is biotin linked and what is the nature of the bond? (ii) What properties do the biotin and the linkage have that enable biotin to interact with two distinct active sites in this enzyme? (iii) What chemical steps take place at each of these active sites (no need to specify the complete reactions)?