A Catalyst article explaining how enzymes allow chemical reactions in all living organisms to proceed quickly, under conditions where they would normally be very slow. By isolating enzymes that could be used to catalyze reactions, scientists have started a major biotechnology industry.
The article describes how enzymes work, and how they can be used and improved in products such as biological detergents. Catalyst is a science magazine for students aged years.
Annual subscriptions to print copies of the magazine can be purchased from Mindsets. Organisation of the Organism 2. Biological Molecules 4. Plant Nutrition 6. Human Nutrition 7. Transport in Plants 8. Transport in Animals 9. Gas Exchange in Humans Respiration Excretion in Humans Bile is made in the liver and stored in the gall bladder.
It is alkaline to neutralise hydrochloric acid from the stomach. It also emulsifies fat to form small droplets which increases the surface area. Home Library Revision Timetable. Free timetable app. The place where these molecules fit is called the active site. In the lock and key hypothesis , the shape of the active site matches the shape of its substrate molecules. This makes enzymes highly specific. Each type of enzyme can usually catalyse only one type of reaction some may catalyse a few types of reactions.
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