Quiz Over Chapter 17 Microbiology

11 Questions | Total Attempts: 79

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Microbiology Quizzes & Trivia

Microbiology is a branch of the scientific topic of biology wherein we take a closer look at some of the organisms that the naked eye itself can’t provide a lot of information on – those bacteria, fungi, viruses and more which need to be looked at and analysed with a microscope.

Questions and Answers
  • 1. 
    The ability of the body to specifically react to a microbial infection. It usually includes a memory component & is acquired during the life of the individual.
  • 2. 
    Glycoprotein that reacts with (binds to) antigen
  • 3. 
    Have at least two binding sites for antigens; valence= number of binding sites
  • 4. 
    Recognize antigens in association with MHCs on APCs
  • 5. 
    Based on functions & cell surface glycoproteins called CDs (clusters of differentiations)
  • 6. 
    Classified as CD4 which are adhesion molecules that bind to MHC class II molecules  on APCs; after binding APC, CD4 cells differentiate into Th1 and Th2 cells; Th1 cells secrete cytokines that stimulate other immune cells and also enable macrophages to degrade microbes that have invaded them; Th2 cells associated with parasitic infections and allergic reactions
  • 7. 
    Classified as CD8 which are adhesions that bind MHC class I molecules; when activated by Th cell, Tc cells become cytotoxic T lymphocytes (CTLs) which can lyse target cells (target cells have endogenous antigen combined with MHC molecule) or induce apoptosis; CTLs release perforin, then granzymes are allowed to enter cell 
  • 8. 
    Appear to suppress other T cells
  • 9. 
    Chemicals by which cells of immune system communicate with each other
  • 10. 
    1st encounter with pathogen (antigen); appearance of IgM, followed by IgG; antibody increase is slow
  • 11. 
    More rapid; IgM production same as in primary response, but there is a rapid rise in IgG due to memory cell activity; antibody peak in 2-7 deays
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