vine a discutir unos asuntos I came to discuss several matters o issues; no sÃ© nada de ese asunto I don't know anything about it o the matter; el asunto de los impuestos divide al gobierno the government is divided on the matter o question o issue of taxes; hemos tratado el asunto de nuestro divorcio we've talked about the subject of our divorce; ...
The Role of Enzymes in Living Organisms. Enzymes are macromolecules that catalyze chemical reactions within a living organism. Most are proteins, but there are also RNA enzymes which aid in protein synthesis.
Enzymes Mechanisms of Enzyme action Enzymes are essential proteins that are found in all living cells. They have two main functions: 1) they act as catalysts ( a catalyst is a chemical which speeds up a chemical reaction ) 2) they control all the chemical reactions going on inside the cell. Every cell has many different enzymes. Each enzyme is specific: it only affects one particular chemical. This chemical that the enzyme alters is called the substrate. An enzyme can either break apart one substrate into two different products, or it can join two substrates into a single product. One example is shown below :