How many fatty acid molecules are present in cortisol?

Which vitamin is synthesized from lipid derivatives?

In an experiment,freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing amounts of cholesterol. Results obtained are shown in the given graph.
The graph indicates:

Which of the following contains only saturated fatty acids in its structure?

$A$ pound of butter contains more usable energy than a pound of sugar for a human because

What is it called when a lipid is conjugated with a carbohydrate?