Micro

  1. Mycology is the study of:
    Select one:



    C) fungi
  2. Bacteria are very active but not yet reproducing in which phase:S
    elect one:



    B) lag
  3. Mesophiles grow best at:
    Select one:



    B) 25-30
  4. Halophiles require an environment with a high concentration of _________ for optimal growth.
    Select one:



    B) salt
  5. Serial dilutions are used to:
    Select one:



    D) obtain bacterial cultures at several different concentrations
  6. Klebsiella os
    • -a genus of bacteria of the family Enterobacteriaceae containing nonmotile
    • -gram-negative, frequently encapsulated rods that are arranged singly, in pairs, or in short chains.
    • -includes some human pathogens.
  7. clostridium
    genus of rod-shaped, spore-forming, chiefly anaerobic bacteria including the nitrogen-fixing bacteria found in soil and those causing botulism and tetanus.
  8. Sporulation occurs in:
    Select one:



    D) clostridium
  9. Sporulation
    can be triggered by adverse conditions, or as part of asexual reproduction
  10. Sporulation usually occurs in response to :
    Select one:



    D) a decrease in the level of carbon or nitrogen
  11. Starch would be broken down to maltose by which of the following enzymes?
    Select one:



    C) amylase
  12. Amylase
    is any of a group of enzymes that catalyze the hydrolysis of starch to sugar to produce carbohydrate derivatives
  13. Maltase
    is one enzyme produced by the cells lining the small intestine to break down disaccharides.
  14. Cellulase
    is any of several enzymes produced chiefly by fungi, bacteria, and protozoans that catalyze the hydrolysis of cellulose
  15. Lipase
    is any enzyme that catalyzes the cleavage of a fatty acid anion from a triglyceride or phospholipid
  16. Gram positive bacteria have:
    Select one:



    A) peptidoglycan in the cell walls
  17. When a bacterial cell divides into two cells, the new cells are called:
    Select one:



    A) daughter cells
  18. A daughter cell
    is a cell formed by the division or budding of another cell; "anthrax grows by dividing into two daughter cells that are generally identical"
  19. Lysis
    is the death of a cell by bursting, often by viral or osmotic mechanisms that compromise the integrity of the cellular membrane.
  20. plasmodesmata
    The cell membrane pulls away from the cell wall, but the cell remains joined to the adjacent cells at points called plasmodesmata. Thus, the cell takes on the appearance of a pincushion, with the plasmodesmata almost ceasing to function because they have become so constricted. This condition is known as plasmolysis.
  21. Plasmolysis
    is the contraction of the protoplasm of cells within plants due to the loss of water through osmosis. It is when the cell membrane peels off of the cell wall and the vacuole collapses when placed in a hypertonic environment.
  22. When cells are placed in a hypertonic environment they will undergo _________.
    Select one:



    B) plasmolysis
Author
thom.mccusker@gmail.com
ID
318859
Card Set
Micro
Description
Micro
Updated