Which does the enzyme need to be fully functional

Why do mountaineers become breathless as they reach high altitudes

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?

What has a person lost function of if they're suffering from carpal tunnel syndrome