What are the facts about enzymes?
Enzymes are proteins They are re-usable
Enzymes bond to a specific substrate
By enzymes, The way in which enzymes actually work is extremely complicated so we use the models to think about them. A good model tries to represent the known facts about something. A model about digestive enzymes needs to try to represent these facts: · Enzymes turn large molecules into smaller ones. · Enzymes do not get used up as they carry out their tasks. · Enzymes change shape as they work. · Each enzyme…
Enzymes are often bigger than the chamicals they bind to They also have a specific shape How do these facts help explain the way enzymes work?
The shape of the enzyme allows it to only accept certain substrates. For example, if you are lactose intolerable you cannot have lactose (a sugar) due to the fact that you do not have lactase (an enzyme) to break the lactose down. Enzymes, themselves, do not, split chemicals the split organic substrates such as carbohydrates, lipids (fats) and proteins.
Enzymes are globular proteins. They reduce the activation energy needed for a reaction to proceed and produce products. Enzymes have a region called an active site. The site is the "lock" into which a substrate "key" fits. The enzyme then fits closely around the substrates. This is called induced fit. Enzyme activity is affected by substrate type,temperature, pH and substrate concentration. Enzyme activity can be inhibited or promoted by other substances.