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6. Yoghurt is formed by the action of bacteria on...?

  • the yeast in the milk
  • the starch in the animal
  • the lactose in the milk
  • the sugars in the cheese

7. When microorganisms are grown on a large scale, certain condition are needed so that the microorganisms can grow effectively and produce their useful product. Which of the following is NOT necessary for the large-scale production of microorganisms...?

  • A constant air supply, to provide oxygen to the microbes
  • Flavourings and preservatives, for taste and aesthetic appeal
  • A motorised stirrer to keep the microbes moving and to maintain an even temperature
  • Sterile Conditions

8. Microorganisms need to be kept at the right temperature in order for them to grow effectively. But why is it necessary for typical fermenters to having cooling jackets?

  • Cooling jackets help increase the efficiency of fermentation
  • Microorganisms work best in very cold conditions
  • The microorganisms produce heat as they respire. Without the cooling jacket, the fermenter would get too hot
  • The carbon dioxide released from the microorganisms creates a lot of heat

9. What is the main component of Biogas?

  • Carbon Dioxide
  • Methane
  • Hydrogen
  • Oxygen

10. Recently, a completely new food, based on fungi, has been developed. It is produced using the fungus FUSARIUM. But what is this food called?

  • Mycoprotein
  • Fusarin
  • Quorn
  • Microprotein

11. Which of the following is something that microorganisms do NOT need to grow?

  • Oxygen
  • A Petri dish
  • A culture medium
  • Warm temperature