#Question id: 4012
#Unit 3. Fundamental Processes
Why is the methylguanosine cap added to mRNA before the poly(A) tail?
#Question id: 4013
#Unit 3. Fundamental Processes
The textbook states that the nucleotide sequence of splice sites is “highly conserved” and of “ancient origin.” How do we know this sequence is ancient?
#Question id: 4014
#Unit 3. Fundamental Processes
Operator constitutive mutants of the lac operon would
#Question id: 4015
#Unit 3. Fundamental Processes
When polymerase bind to promoter, it spontaneously undergoes a transition to the open complex and initiates transcription. This gives a low level of constitutive expression called the basal level. The rate -limiting step in basal level transcription
#Question id: 4016
#Unit 3. Fundamental Processes
Activators that stimulate this kind of promoter work by triggering a conformational change in either RNA polymerase or DNA; that is, they interact with the stable closed complex and induce a conformational change that causes transition to the open complex. This mechanism is an example of
#Question id: 4017
#Unit 3. Fundamental Processes
Which of the following sequences of events occurs when E. coli are released from catabolite repression by transfer to low-glucose medium?