True. A protein becomes functional only when it reaches its tertiary shape (3D). It is not necessary for the protein to reach the quaternary stage, but that is just a more complex functioning protein. It really is just two tertiary merged together. Example is red blood cells.
The answer is; obesity can cause diabetes
It is believed that obesity caused stress on the body cells making them produce cytokines, proinflammatory markers that make them resistant to insulin. Obesity can also impair the beta-islets cells of the liver that produce insulin. All these make the body's response to glucose levels unregulated causing diabetes.
An earthquake is the result of a sudden release of stored energy in the earths crust that creates seismic waves.