Catalysts lower the Activation energy for reactions. The lower the activation energy for a reaction,the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrate ms bind.
Today, the Earth's axis is tilted 23.5 degrees from the plane of its orbit around the sun.
They are ineffective against viral infections because viruses can not be treated with antibiotics.
<span>Gasoline contains stored chemical energy. When gasoline is burned in a lawn mower, the energy is transformed into mechanical and thermal energy.</span>
