A bacterial operon is usually turned on, but it can be turned off when it is not needed. This is a(n) operon.

Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?

On his trip to the galapagos islands, darwin determined that animals on the islands

Aclient is to receive rifampin. which would be most important for the nurse to include in the teaching plan for this client?