Possesses quercetin 7-O-glucosyltransferase and 3'-O-glucosyltransferase activities in vitro. Also active in vitro on benzoates and benzoate derivatives. Glucosylates other secondary metabolites in vitro like trans-resveratrol, curcumin, vanillin and etoposide. a flavonol + UDP-alpha-D-glucose = a flavonol 3-O-beta-D-glucoside + H(+) + UDP a 7-O-hydroxy-flavonol + UDP-alpha-D-glucose = a flavonol 7-O-beta-D-glucoside + H(+) + UDP Belongs to the UDP-glycosyltransferase family.