Lesson Plan: B1.1.07

Hamble Lesson Observation Plan
Learning About
What effect do disinfectants and antibiotics have on bacteria growth?
Keywords:
  • Colony : a group of fungi or bacteria grown from a single spore or cell on a culture medium. (1)
  • Culture : the cultivation of bacteria, tissue cells, etc. in an artificial medium containing nutrients. (1)
  • Microbiology : the study of microorganisms. (1)
  • Bacteria : unicellular microorganisms which have cell walls but lack organelles and an organized nucleus. (1)
Memory Anchor:
Method Precise Learning Objective Linked Question / Activity
(Designed for maximum working out)		 Stepping Stones Pitstop Check
(Thinking Map)
(Biology only) Required Practical 2 - Microbiology (Biology only) (AT skills 1,3,4,8) (Biology only) Required Practical 2 - Microbiology (Biology only) (AT Skills 1,3,4,8)
(Biology only) Bacteria multiply by simple cell division (binary fission) as often as once every 20 minutes if they have enough nutrients and a suitable temperature. (Biology only) How do bacteria divide?
(Biology only) Bacteria can be grown in a nutrient broth solution or as colonies on an agar gel plate. (Biology only) When investigating the growth of bacteria, in what two ways can they be grown?
(Biology only) Uncontaminated cultures of microorganisms are required for investigating the action of disinfectants and antibiotics. (Biology only) What is special about the culture of organisms required when investigating the action of disinfectants and antibiotics?
(Biology only) Students should be able to describe how to prepare an uncontaminated culture using aseptic technique. (Biology only) How is an uncontaminated culture of microgransims prepared?
(Biology only) They should be able to explain why petri dishes and culture media must be sterilised before use (Biology only) Why are petri dishes and culture media sterilised before use?
(Biology only) They should be able to explain why inoculating loops used to transfer microorganisms to the media must be sterilised by passing them through a flame (Biology only) Why are inoculating loops, used to transfer microorganisms to media, passed through a flame?
(Biology only) They should be able to explain why the lid of the Petri dish should be secured with adhesive tape and stored upside down (Biology only) Why should the lid of the Petri dish should be secured with adhesive tape and stored upside down?
(Biology only) They should be able to explain why in school laboratories, cultures should generally be incubated at 25?C. (Biology only) Why should cultures be incubated at 25oC in school laboratories?

AQA Biology Required Practical 2 - Microbiology
Links To the Big Ideas
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