For the first installment: chicken breasts, arguably one of the most difficult of the standard meats to grill. It's all too common of an occurrence to get dry, chewy, cardboardy breasts. This is all correctable though, and chicken breasts can be fantastic on the grill, it just takes a little know-how.
In prokaryotic cells, this involves the induction, repression, or enhancement of enzyme synthesis by regulatory proteins (def) that can bind to DNA and either induce, block, or enhance the function of RNA polymerase (def), the enzyme required for transcription.
E. coli, remember, is a prokaryote; an organism whose cells lack a nucleus. Prokaryotic DNA is clustered into groups of genes called operons. When scientists first studied the lac operon found in E. coli, they observed gene regulation through transcriptional repression and induction.We've talked about repression and induction before. Repression describes a decrease in gene transcription, whereas induction is an increase in gene transcription.e call the individual genes structural genes. A structural gene is any gene that codes for a structural protein or an enzyme. Remember, enzymes are just one kind of protein. The structural genes in the lac operon code for three different enzymes.