When an abundance of lactose is present in a bacterial cell then a. lactose will block the action of rna polymerase, prohibiting of the transcription of the gene. b. enhancers will be triggered to speed up the process of mrna production. c. the lac operon will be inhibited and no lactose will need to be produced via translation. d. lactose will bind to the repressor, allowing the gene coding for the enzyme lactase to be transcribed.

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.