#Question id: 10456
#Unit 6. System Physiology – Plant
Two identical subunits of UVR8 are linked in the dimer by a network of
#Question id: 4271
#Unit 3. Fundamental Processes
To participate successfully in the peptidyl transferase reaction, the tRNA must rotate into the peptidyl transferase center of the large subunit in a process called as
#Question id: 23671
#Unit 13. Methods in Biology
#Question id: 1295
#Unit 4. Cell Communication and Cell Signaling
What signal is released by endothelial cells to recruit circulating leukocytes?
#Question id: 3981
#Unit 3. Fundamental Processes
The diagram below represents a hypothetical operon in the bacterium E. coli. The operon consists of two structural genes (A and B), which code for the enzymes A-ase and B-ase, respectively, and also includes P (promoter) and O (operator) regions as shown.
When a certain compound (X) is added to the growth medium of E. coli, the separate enzymes A-ase and B-ase are both synthesized at a 50-fold higher rate than in the absence of X. (X has a molecular weight of about 200.) Which of the following statements is true of the operon decribed above?