The nucleus of the cell is responsible for

The nucleus of a cell is responsible for storing all the waste. It's kind of like a bladder, but for plant amd animal cells.

The nucleus is the control centre of the cell, and contains the genetic material that is organized in chromosomes. This compartment of the cell is responsible for the expression of the genes contained in the chromosomes, as well, it is the major site for cell reproduction and growth.

This bacteria must be very strong as it has a large amount on antibiotic targeting it. this bacteria could be one of many different types and it is very hard to tell which one with out more information.