Enzymes originally evolved in high-temperature environments and later adapted to lower temperatures as Earth cooled. Scientists discovered that a key shift in enzyme function occurred over ...

Life has evolved over billions of years, adapting to the changing environment. Similarly, enzymes—proteins that speed up ...

However, at high temperatures the rate decreases again because the enzyme becomes denatured and can no longer function. This is shown in the graph below. In the graph above, as the pH increases so ...