Microorganisms

Microorganisms

MRS GREN
1. Movement
2. Respiration
3. Sensitivity
4. Growth
5. Reproduction
6. Excretion
7. Nutrition
Bacteria
1. Multiply very quickly
  1. Release poisons (toxins)
    1. Attack cells
    2. Dangerous when more bacteria present
2. Uses
  1. Yoghurt
  2. Cheese
  3. Soap powder
  4. Aids digestion
3. Facts
  1. Simple, single celled
  2. No true nucleus
  3. Just coils of DNA
  4. A cell wall
  5. A cell membrane
  6. small, approx. 1/1000mm
  7. Can be treated with ANTIBIOTICS
4. Causes
  1. Food poisoning
  2. Tetanus
  3. TB (Tuberculosis)
  4. Tonsilitis
Virus
1. Facts
  1. A strand of genetic information (DNA or RNA)
    1. Surrounded by a protein coat
  2. No nucleus
  3. Non-living
  4. Can only reproduce by invading other cells
    1. Parasitic
  5. Very small, approx. 1/1,000,000mm
2. Viruses inject their DNA into other cells
  1. This directs the cell to produce more viruses
  2. Eventually, the cells get so full of viruses that they burst
3. Uses
  1. Genetic engirneering
  2. Some to kill bacteria
4. Causes
  1. Chickenpox
  2. AIDS
  3. Common cold
  4. Influenza
Fungi
1. Facts
  1. Contain Nuclei
  2. Lack chlorophyll
  3. Multi cellular fungi
    1. Are made up of tubular threads called hyphae
    2. A thick mat of hyphae make up the body of the fungus
      1. This is called Mycelium
  4. Yeast is a fungi
  5. Grow longer and release poisons which attack cells
2. Uses
  1. A source of antibiotics
  2. Production of beer and bread
3. Causes
  1. Athlete's foot
  2. Ringworm
Protoctistans
1. Plasmodium

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