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Edexcel IAL Biology 4.10 Conditions for bacterial growth

Identify the limiting condition, connect it to enzyme reactions or cell water balance and use each organism's response in the graph rather than assuming one optimum.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Explain optimum temperature and water through enzymes, hydrolysis and metabolism.
  • Apply oxygen, nutrients, pH or mineral supply to a named bacterial culture.
  • Interpret growth curves for oxygen, salt, drying or contrasting bacterial types.

4.10—Conditions for bacterial growth question 1

[Maximum number: 3]

Boards used for chopping fruit and vegetables can be made from wood or oil-based plastics.

The photograph shows some chopping boards.

Figure for Question 4.10—Conditions for bacterial growth question 1 — Edexcel A-Level Biology AS

Bacteria can grow on the surfaces of chopping boards.

Explain the conditions that would result in the greatest bacterial growth on the surface of a chopping board.

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