The maltose operon contains genes that code for proteins that catabolize the disaccharide maltose. similar to the lac operon, which is only efficiently transcribed in the presence of lactose, the maltose operon is only efficiently transcribed in the presence of maltose. how might induction of the maltose operon in response to maltose be achieved? choose one or more: a. maltose removes a repressor from an operon with an efficient promoter. b. maltose causes an activator to bind an operon with an efficient promoter. c. maltose causes an activator to bind an operon with an inefficient promoter. d. maltose causes a repressor to bind an operon with an efficient promoter. e. maltose removes an activator from an operon with an inefficient promoter.