which region (ribose or base) could be modified to create an inhibitor ?

Which are the Advantages of the lactose system in E. coli?

Consider the image of the attached protein.  Now imagine you have a proteolytic enzyme that cleaves peptide-bonds on the C-terminal sides of basic amino acids.  If the enzyme cleaves the attached protein, what would the end result be? a.) A single amino acid and a tripeptide b.) two dipeptides Please diagram and explain!  Thanks!

In an attempt to understand whether viruses rely on proteins or nucleic acids to transmit their genetic information into their host cells, scientists were able to track the movement of phosphorus and nitrogen from the virus to its host cell. Which of the following describes the most likely conclusion from this observation? A B с D The molecule that is transmitted by the virus is a protein since proteins contain nitrogen but nucleic acids do not. The molecule that is transmitted by the virus is a protein since proteins contain phos- phorus but nucleic acids do not. The molecule that is transmitted by the virus is a nucleic acid since nucleic acids contain phosphorus but proteins do not. The molecule that is transmitted by the virus is a nucleic acid since nucleic acids contain nitrogen but proteins do not.