Possesses quercetin 3-O-glucosyltransferase and 7-O-glucosyltransferase activities in vitro. 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. Truncated N-terminus.