Biology Edexcel A A-level topic 6 p2 infection and the immune system

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Across
  1. 2. A polysaccharide layer that surrounds bacterial cells and provides strength.
  2. 5. The name given to the loss of immune function through the destruction of the immune system over time after infection by HIV.
  3. 6. Immunity that is gained by the transfer of premade antibodies to an individual through an injection.
  4. 8. A protein molecule which binds to an antigen and is produced by B cells in response to an infection.
  5. 9. A type of antibiotic which prevents bacteria from growing by interfering with processes required for their growth such as metabolism or DNA replication.
  6. 10. A foreign substance which is capable of triggering an immune response.
Down
  1. 1. A type of antibiotic which kills bacteria.
  2. 3. Immunity that is acquired by exposure to a dead or weakened version of a pathogen in the form of a vaccine.
  3. 4. A type of unicellular prokaryote which can exist alone or as a parasite.
  4. 7. A type of cell which breaks down pathogens and presents the cellular fragments on their surface for detection by other immune cells.