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Leaving Certificate Biology Defence System & Viruses EQ iQuiz FIRST In PowerPoint 2007 if you see a Security Warning click HERE on Options… and then click on Enable this content SECOND Press the F5 Key to Begin, Then click on this Blue Box What is meant by the term immunity? Getting a vaccine Resistance to disease Protection against bacteria Protection against an infection What is the purpose of a vaccination? To produce antigens To produce antibodies To kill bacteria To kill viruses What is an antigen? A protein produced by white blood cell A type of white blood cell A vaccine A foreign molecule What is the role of a B lymphocyte? Produce antibodies Produce antigens Produce white blood cells Suppress immune response Why would you give an antibody instead of a vaccination It would be quicker They are more readily available To stop you getting the disease No vaccine available What is active immunity? Producing a vaccine Production of your own antibodies Production of your own antigens Getting the flu Name the two main chemical components of a virus. DNA and nucleic acid Protein coat and nucleus Proteins and fats Proteins and carbohydrates What do viruses use to reproduce? Proteins The host’s cells Genes Chromatin Which one of the following is an example of the beneficial effect of a virus? Producing cheese Getting bread to rise Vaccine production Producing alcohol What is the purpose of a vaccination? To give you the disease To kill a viral infection To trigger antibody production To kill bacteria Why don’t doctors prescribe antibiotics for the common cold? Antibiotics only kill the flu Antibiotics don’t kill viruses The cold is a bacterial infection They are too expensive Why were young people more at risk of becoming ill with swine flu than older people? Because they don’t take vitamins No previous exposure to virus They don’t keep warm enough They don’t eat fruit and veg. Which of the following is a disease caused by a virus? Athletes Foot Ringworm Polio Strep throat Which of the following is a type of lymphocyte? I C A B What is passive immunity? Immunity by vaccination Transfer of antibodies from another organism Immunity from previous exposure Introduction of pathogen Defence System & Viruses EQ iQuiz How did you do? Click this Blue Box to find out