The flashcards below were created by user RubyRose on FreezingBlue Flashcards.

  1. Who was able to develop the first vaccine for rabies in 1884, he also proposed the term "virus" to denote the special group of infectious agents.
  2. Ivanovski and Beijernick showed that a virus was responsible for this disease in plants.
    tobacco mosaic virus
  3. Loeffler and Frosch discovered this disease that infects animals?
    foot-and-mouth in cattle
  4. These are noncellular particles with a definite size, shape, and chemical composition that can be cultured in a lab using special techniques.
  5. the study of viruses
  6. T/F? viruses are a unique group of biological entities known to infect every type of cell, including bacteria, algae, fungi, protozoa, plants, and animals.
  7. T/F? Viruses are a type of obligate intracellular parasite that cannot multiply unless they invade a specific host cell.
  8. Viruses instruct the host cell's genteic and metabolic machinery in order to release what?
    quantities of new viruses
  9. Viral replication inside a cell will usually result in the loss of functionality of that cell or this.
    death of that cell
  10. What is the size range of viruses? (nm)
    20 - 450 nm
  11. The basic structure of viruses consists of what? (2)
    capsid surounding a nucleic acid core
  12. T/F? The nucleic acid of a virus consists of DNA and RNA.
    False. Can contain either but not both.
  13. The nucleic acid can take on what structures?
    • single or double-stranded DNA
    • single or double-stranded RNA
  14. Term that refers to something that is so minute (<0.2um) that an electron microscope is necessary to detect them or to examine their structure.
  15. Some viruses may contain this, a type of covering, in addition to the capsid and central core.
  16. This term refers to the capsid and the nucelic acid of a virus.
  17. A modified piece of the host's cell membrane that some viruses posses.
  18. How many families of animal viruses are there? How many of these possess an envelope external to the capsid?
    • 20
    • 13
  19. Viruses that consist of only a nucleocapsid are considered this.
  20. A fully formed virus that is able to establish an infection in a host cell is often called this
  21. T/F? Virus' crystalline appearance is due to their molecular structure of regular, repeating subunits.
  22. Viruses are essential for the production of vaccines to treat these three viral infections.
    • influenza
    • polio
    • measles
  23. Combining less harmful viruses ( vaccinia, adenovirus) with genetic material from a pathogen creates a vaccine that provides immunity without exposure to the intact pathogen. This harmless virus approach is being used to treat what 2 genetic diseases?
    • cystic fibrosis
    • sickle cell
  24. ONYX (mutant adeno viruses) target and cause the self-destruction of what type of cells?
    cancer cells
  25. The subunits that make up each capsid.
  26. Capsomers are constructed from what type of molecules?
  27. Two types of capsids.
    • helical
    • icosehedral
Card Set
Show Answers