ZIMSEC O Level Combined Science Notes: The enzyme amylase
- Energy in cells is obtained by breaking down food molecules during the respiration process.
- The chemical reactions involved are carried out by enzymes.
- Enzyme molecules also break down food molecules in the digestive system and carry out chemical reactions in the photosynthesis and gemination processes.
- Enzymes are important because they speed the rate f reactions.
- Catalyst-is any substance that speeds up the rate of reaction.
- A catalyst can be organic or inorganic.
- Catalysts do not take part in the reaction i.e. they are not changed chemically by the reaction.
- Enzymes like amylase are organic catalysts.
- Enzymes regulate metabolism.
- Metabolism-are all the combined functions and processes that take place in living organisms.
- Enzymes are protein molecules whose structure is complex and each enzyme can only catalyse one specific reaction.
- Amylase is an enzyme found in saliva and pancreatic juices.
- It converts starch into simple reducing sugars (maltose).
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