A conversion disorder is a relatively uncommon mental disorder in which a person has physical symptoms that no medical condition, physical examination or testing can explain. The person is not faking.. The symptoms do not appear to be under the person's conscious control and they can cause significant distress.
The most important chemical reaction of all is photosynthesis. At first I thought that the most important reaction was respiration, the set of reactions in our cells that keeps us alive by combining glucose with oxygen and provides the energy that keeps us alive. Then I realized that we would not be alive without the oxygen in the first place.
Catabolic reaction and enzymes â Lactose a case study. Background: As you know, enzymes are important molecules because they reduce the activation energy of major chemical reactions in the body. If enzymes were not present chemical reactions in organisms would occur at such low rates that life would not be possible.