AQA Biology B1.1: Keeping Healthy


1. Genetic alterations can result in a new forms of pathogens. These new forms may develop into entire strands of antibiotic resistant bacteria through...

  • Selective inheritance
  • Natural selection
  • The theory of acquired characteristics
  • Genetic descendancy
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Other questions in this quiz

2. Why can antibiotics not be used effectively to combat viruses?

  • Viruses do not have antigens (surface proteins), and thus their protein composition cannot be fragmented by antibiotics
  • Viruses reside and reproduce within the body's own cells, and thus cannot be easily identified as harmful foreign bodies and inhibited
  • Viruses are more proficiently adapted to infection than bacteria, and thus develop antibiotic resistance to quickly to make use viable
  • Viruses replicate the body's own genetic material, and incorporate this into their own plasmids, and thus effectively become genetically identical to the body, and cannot be identified as harmful foreign bodies

3. Which of the following is an apparatus usually used in the development of controlled bacteria cultures?

  • Vaccinating loop
  • Sterilising loop
  • Inoculating loop
  • Immunising loop

4. Vaccines contain pathogens. True or false?

  • True: But only dead or inactive forms of them; in this way, immunity can develop at little or no risk to the patient
  • False: This would be an entirely unnecessary risk; immunity is developed more effectively without the presence of pathogens to elicit illness

5. Hungarian physician Ignaz Semmelweis employed what method of infection prevention in many hospitals?

  • The Semmelweis ward rotation method for patients
  • Hand washing before treatments and between wards
  • The wearing of face masks by all medical staff
  • Use of disinfectant on all medical instruments following use


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