The motor neurons is the answer but I'm not sure
The medulla oblongata detects the levels of oxygen and carbon dioxide concentrations and signals the muscles in the heart, the lungs and diaphragm to increase or decrease thebreathing. The pons controls the speed of inhalation and exhalation orrespiration rate depending on the need of the body.
In DNA, which is located in the nucleus of the cell
You didn't list any...
LAC = inducible repressor
TRP = repressive