PLEASE HELP!! What government entity was created to set industry standards for water quality?
Department of Agriculture
National Oceanic and Atmospheric Administration
Environmental Protection Agency

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

The first amino acid of a new polypeptide chain is