DNA has a negative charge because of the phosphate ions in its chemical backbone.
Homeostatic regulation involves three parts or mechanisms: 1) the receptor, 2) the control center and 3) the effector. The receptor receives information that something in the environment is changing. The control center or integration center receives and processes information from the receptor.
Homeostasis is the process through which an organism maintains certain internal conditions, such as a human body's internal mechanisms maintaining body temperature at a specific level to prevent over or under heating; this process is important because it makes it possible for cells and organs to function properly.