You are growing E. coli in a laboratory in order to study their operons. The growth media you are using contains lactose, no glucose and no tryptophan.  Using your knowledge of operons and their regulation   a.Which operons would be functional under these conditions? b.What repressors would be made? (NOTE: name the repressors using their gene names) c.Which repressor(s) would be made in the inactive form? d.Which repressor(s) would be made in the active form? e.Which repressor(s) under these conditions can bind the operator sequence? f.Which repressor(s)under these conditions cannot bind the operator sequence?

You are doing a genetic engineering experiment. You use restrictions enzymes to cut the regulatory sequences from the lac operon and replace them with the regulatory sequences of the trp operon. Specifically, you will eliminate everything upstream of the beginning of lacZ and replace them with the trp sequences upstream of the beginning of trpE, including trpR. Now, describe the regulation of your ñew constructed gene. What will you do to get expression of the three lac genes? The lac Operon and its Control Elements lacl CAP P lacz lacY lacA genes 5 DNA binding site 3 AUG AUG AUG messenger RNA RNA polymerase blocked from transcribing trp operon Regulatory gene trp operon T PR Ptrp DNA trpR trpE trpD trpC trpB trpA Repressor bound to operator Promoter 5' trpR-MRNA R (a) Tryptophan present, repressor bound to operator, operon repressed. When complexed with tryptophan, the repressor protein produced by the trpR gene binds tightly to the trp operator, thereby preventing RNA polymerase from…

Which of the following is the most likely target of retinoblastoma protein (RB)?  a kinase involved in secretion  a protein responsible for ATP production DNA polymerase  Phosphodiesterase, which breaks phosphodiester bonds

The regulation of the trp operon genes by the Trp repressor protein is an example of ______ gene regulation. A.)positive B.)negative