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Unformatted text preview: / I+ P+ O+ Z- Y+ 2) Is P+ O+ Z- Y- / I- P+ O+ Z+ Y+ 3) Is P+ Oc Z- Y+ / I- P+ O+ Z+ Y- 4) Is P+ O+ Z+ Y- / I- P- Oc Z- Y+ 5) I- P+ O+ Z+ Y- / I+ P+ Oc Z- Y+ 6) I- P+ Oc Z+ Y- / I+ P+ O+ Z- Y+ b). Considering the elements I, P and O, which of these function in cis and which function in trans ? (3 pts) cis functioning:________________ trans fuctioning:_______________ c). The graph below depicts the results of an experiment performed by Pardee, Jacob and Manod. In this experiment, they measured the relative amounts of ß-galatosidase protein synthesis in an lacI- lacZ-E. coli mutant after introduction of the lacI+ lacZ+ genes via transformation at time = 0. Using your knowledge of the lac operon, explain why, in the absence of inducer, ß-galactosidase protein levels initially accumulate but then decline. (8 pts)...
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- Spring '08
- Genetics, p+ o+