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Question 11

From Biology SL Paper 3 (November 2024, TZ2)

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  1. The diagram shows the results of a study of metabolic activity within biofilm cell clusters, using fluorescent tags for specific metabolic markers.
Diagram illustrating a biofilm with different layers representing varying levels of metabolic activity (high, intermediate, low, dormant).
Diagram illustrating a biofilm with different layers representing varying levels of metabolic activity (high, intermediate, low, dormant).

(a) Define biofilm. [1]

(b) List two examples of problems caused by biofilms. [2]

(c) Using the diagram, suggest two factors affecting the action of antibiotics on this biofilm. [2]

Textbook topics in this question

Review the exact course sections assessed by each question part.

Mixed-topic question
11(a)5.2 Prokaryotic Cell StructureBiofilms · legacy topic
11(b)10.3 HIV, Antibiotics and ResistanceBiofilms and disease · legacy topic
11(c)10.3 HIV, Antibiotics and ResistanceBiofilms and antibiotic resistance · legacy topic