When needed for a source of energy fatty acids are broken down into?

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.