Your answer would be: enzyme-linked receptor.
Although chemical reactions occur in almost every part but mitochondria have more metabolic cycles and reactions as it generates ATP also called power house of cell.
<span>A large event such as a major earthquake can be considered not a disaster when there are less or better yet no casualties involved during the event. It is considered not a disaster when there are no damages involved. Hope this answers the question. Have a nice day.</span>