GCSE Biology (AQA)

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Antibiotic Resistance

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Inheritance, Variation and Evolution The Development of Understanding of Gentics and Evolution

Antibiotic Resistance

1:38 Pressure on Organisms
Spec 4.6.3.7
Previous Mass Extinction Next Evolution of Antibiotic Resistance
  • Mutations of bacterial pathogens can produce new strains.
  • Strains are variants of a bacterial species with different phenotypes.
  • Diagram illustrates strain A of a bacterium mutating into strain B with a slightly different phenotype.
  • Different strains are genetic variants.
  • Some strains may become antibiotic resistant.
  • Antibiotic-resistant strains can produce mechanisms to protect against antibiotics.
  • As a result, some antibiotics will not effectively kill these bacteria.
  • Bacteria may no longer be killed by common antibiotics like penicillin, necessitating different or new antibiotics.
  • Developing new medication is a lengthy process.
  • Antibiotic resistance should be understood for exams.
  • Antibiotic-resistant bacteria can spread and cause severe illnesses without effective treatments.
  • Resistance strains spread easily as people aren't immune to them and lack effective antibiotics.
  • It's crucial to prevent the spread of these resistant strains.
  • For exams, understanding the importance of antibiotics and the concerns of antibiotic resistance is essential.

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