1.a. In positive transcriptional regulation, RNA polymerase binds to the promoter only if a __________ binds to _________.
a. a repressor, a site near the promoter
b. activator, operator
c. activator, a site near the promoter
1.b. Which of the following is an effect of the presence of glucose on the lac operon?
a. CPR binds to glucose and metabolizes it
b. Lacl binds to glucose
c. CPR doesn't bind to the CBS
1.c. Which of the following proteins would increase in amount as a result of the lac operon being expressed?
a. Lacl
b. LacZ
c. rna polymerase
1.d Which of the following is a direct effect of the presence of lactose on the lac operon?
a. CPR binds to lactose and metabolizes it
b. Lacl repressor binds to lactose and not the lacO operator
c. CPR recruits RNA pol and activates transcription of lac operon genes