Biology Chapter 19.1

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  1. Diseases that can be transmitted from one individual to another result from the activity of ______________.
    Infectious agents
  2. Define: Pathogen
    Disease causing organisms
  3. What are all the types of pathogens?
    • 1. Viruses
    • 2. Bacteria 
    • 3. Eukaryotic
  4. A _________ pathogen can be spread from one organism to another.
    contagious 
  5. A ________ is a pathogen that finds a tissue inside the body that will support its growth.
    infectious 
  6. __________ is an organism that obtain nutrients and shelter required for growth and development from a different organism while contributing nothing to the survival of the host.
    Parasites (yucky)
  7. Most ___________ agents are parasites.
    infectious
  8. Organisms that can be seen only when viewed through a microscope are called ____________ _________, or ________ .
    microscopic organisms, or microbes
  9. What are the 2 most common microbes?
    • 1. bacteria
    • 2. viruses
  10. ___________ are: 
                      
                          A. Tiny
                          B. Single celled
                          C. Prokaryotic
    Bacteria
  11. Bacteria Shapes - Know these
    Image Upload
  12. Bacteria Shapes
    Image Upload
  13. Bacteria Shapes
    Image Upload
  14. What are the steps in Binary Fission?
    • 1. Chromosome
    • 2. Chromosome copied
    • 3. Construction of cell wall 
    • 4. Separation of chromosomes
  15. Explain step 1 of Binary Fission
    1. The bacterial cell begins with one copy of the circular DNA chromosome that is wound around itself.
  16. Explain Step 2 of Binary Fission
    2. The chromosome is copied, and each copy is attached to the plasma membrane.
  17. Explain step 3 of Binary Fission
    3. Continued growth separates the two chromosomes. The plasma membrane pulls inward in the middle, and a new cell wall is constructed.
  18. Explain Step 4 of Binary Fission.
    4. Daughter cells separate.
  19. Bacteria _________ a nucleus.
    lacks
  20. Bacteria have what attached instead of a nucleus?
    • Nucleoid Region containing: 
    •     -Double-Stranded, circular DNA chromosome
    • or 
    •      - Plasmids
  21. What is a plasmid?
    A small, circular, extrachromosomal DNA
  22. _________ carry genes on the plasmids that provide protection against, chemicals, called _________, designed to kill them.
    1. Bacteria 

    2. Antibiotics
  23. Bacterial cells are surrounded by a cell wall that provide:
    • 1. Rigidity 
    • 2. Protection
  24. What is the bacterial cell wall composed of?
    • 1. Protein
    • 2. Carbohydrate
  25. Bacteria has what to aid in movement?
    • 1. Pili 
    • 2. Flagellae
  26. Antibiotic resistance develops as a result of ___________________
    natural selection on a bacterial population.

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Author:
PrayerHeals
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239439
Filename:
Biology Chapter 19.1
Updated:
2013-10-08 04:56:11
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Chapter 19
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