1.1 - Classification of Microorganisms
1.2 - Factors that Affect the Growth of Microorganisms
1.3 - Useful Microorganisms
(a) Digestion of Food
- The useful bacteria in human intestine make vitamins such as vitamin K and B.
(b) Decomposition and Recycling of Materials
- Saprophytic bacteria and fungi release enzymes that help to break down complex organic matter in dead organisms into simpler substances by decomposition.
(c) Medicines and Health Supplement
- Antibiotics, e.g: penicillin (an antibiotic) which is widely used to kill bacteria that cause various diseases.
- Vaccine consists of dead/weekend harmful microorganisms that is injected/swallowed into human body in turn produce antibodies to fight the disease caused by the harmful microorganisms.
(d) Agriculture
- Making composts
- Biological control
(e) Industries
- Making bread
- Brewing alcoholic drinks
- Making animal skins
1.4 - The Harmful Effects of Microorganism
1.5 - Ways to Prevent Infections Caused by Microorganisms
1.6 - How Diseases Caused by Pathogens are Treated
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