No, a fat and sugar molecule would not be acted upon by the same enzyme. Fats are broken down by enzymes called lipases, while sugars are broken down by enzymes called glycosidases. Lipases and glycosidases are different types of enzymes with different structures and functions. Lipases are responsible for hydrolyzing the ester bonds in fats, while glycosidases are responsible for hydrolyzing the glycosidic bonds in sugars.