Males are heavier than females; males weigh 794 to 1,323 pounds (360 to 600 kilograms), while females weigh 595 to 882 pounds (270 to 400 kg), according to the National Museum of Natural History. Moose have short tails, a hump on their shoulders and large ears that can rotate to give them stereophonic hearing.
The Effect of pH on Enzyme Activity. pH is a measure of the concentration of hydrogen ions in a solution. The higher the hydrogen ion concentration, the lower the pH. Most. enzymes function efficiently over a narrow pH range. A change in pH. above or below this range reduces the rate of enzyme reaction. considerably.
Why does optimum pH promote enzyme activity? A variation in temperature as little as 1 or 2 degrees Celsius can increase an enzyme-catalyzed reaction rate by 10 to 20 percent. Raising the temperature 10 degrees increases the activity rate of most enzymes by 50 to 100 percent. There is an exception is when temperatures reach a certain threshold above the optimal temperature level.