What happens to the trp operon when tryptophan level is high in the cell?

In negative selection, the researcher is selecting for the mutant that will survive on the selective medium.

Where does the active repressor protein bind in the lac operon?

A bacterium can grow at 5oC but grows best at 14oC and does not grow above 21oC and below 5oC. The temperature 5oC is:

A base substitution results in a change in the amino acid. This is an example of:

Which process requires bacteriophages to transfer genetic information from the chromosome of a donor bacterium to a recipient bacterium?

What is the general term used to describe organisms that can produce energy in the absence and presence of oxygen. 

Exposure to UV light can cause:

What is the general term used to describe organisms that can produce energy in the absence and presence of oxygen. 

A bacterium can grow at 5oC but grows best at 14oC and does not grow above 21oC and below 5oC. The temperature 5oC is: