Microbiology

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Author:
kaori
ID:
282825
Filename:
Microbiology
Updated:
2014-09-12 12:42:21
Tags:
Microbial Growth
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Description:
Microbial Growth
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  1. An organism that only consumes plant matter is called an ____.
    Herbivore
  2. A ___ is an organism that decomposes dead organic matter to obtain its source of carbon.
    Saprobe
  3. ___ ___ refers to the method of cell division of bacteria; one parent cell gives rise to two genetically identical daughter cells.
    Binary Fission
  4. An ___ is a bacterium that requires a pH range of 8 to 12, such as many soil bacteria.
    Alkalinophile
  5. There is a ___ fold difference in pH from one whole number to the next.
    10
  6. The ___ phase of the bacterial growth curve represents the greatest rate of growth.
    Log
  7. ___ are ancient bacteria that survive extreme pH, temperature, and salt environment.
    Archaebacteria
  8. An organism cannot survive in a temperate above its maximum because all of its proteins ____ and become nonfunctional.
    Denature
  9. An ___ is a bacterium that requires a pH range of 0 to 5, such a Helicobacter pylori, which causes stomach ulcers.
    Acidophile
  10. Archaebactera that are extreme halophiles lie in places such as the ___ ___ and Great Salt Lake, where salt concentration range from 10-30%.
    Dead Sea
  11. The ___ phase of the bacterial growth curve shows no increase in the number of cells because bacteria is just getting acclimated to a new environment.
    Lag
  12. Although both living and dead cells are counted, the ___ microscopic count to measure bacterial growth involves clicker-counting bacteria under a grid-etched cover slip under a microscope.
    Direct
  13. An __ ___ is a bacterium that requires the presence of atmospheric O2.
    Obligate Aerobe
  14. The ___ phase of the bacteria growth cure occurs when the rate of reproduction is less than the rate of death, resulting in a decline in population size. This is due to overcrowding, toxic waste build up, depletion of food, etc.
    Death
  15. A solution with more OH- ions than H+ ions has a pH value above 7 and is referred to as ___, or basic.
    Alkaline
  16. ____ bacteria require the presence of small amounts (2%-10%) of O2, but atmospheric levels (20%) of Oare toxic.
    Microaerophilic
  17. An ___ is an organism that consumes both plant and animal matter.
    Omnivore
  18. A ___ is a bacterium that lives in temperatures from -5°C to 20°C (such as cold springs, polar regions, and even the refrigerator!)
    Psychrophile
  19. The term ___ refers to how an organism obtains both energy and carbon compounds.
    Nutrition
  20. ___ bacteria are indifferent to Oconcentrations. They don't use it, but are also not poisoned by it.
    Aerotolerant
  21. When performing an optical density test to estimate bacterial population size, the more cells there are in the bacterial suspension, the ____ light will pass through without being scattered.
    Less
  22. ____ bacteria have special growth factor requirements, such as certain minerals, vitamins, amino acids, etc. Blood agar is a common growth medium for them.
    Fastidious
  23. ___ time is the time required for one bacterial cell to produce two new daughter cells; Also called doubling time, it averages 20 minutes under optimum condition.
    Generation
  24. An organism that cannot make carbon compounds from just CO2 is termed a ____.
    Heterotroph
  25. The prefix ___ refers to organisms that obtain energy from good molecules.
    Chemo
  26. A ___ is a bacterium that grows in temperatures from 40°C to 90°C (such as in hot springs, compost heaps, and oceanic volcanoes).
    Thermophile
  27. An organism that can produce carbon compounds from just CO2 is termed an
    Autotroph
  28. A solution with more OH- ions than H+ ions has a pH value above 7 and is referred to as ___, ir alkaline.
    Basic
  29. The ___ phase of the bacterial growth cure occurs when the rate of reproduction equals the rate of death, resulting in no net change in the population size.
    Stationary
  30. Binary fission refers to the method of cell division of bacteria; one ___ cell gives rise to two genetical identical daughter cells.
    Parent
  31. The reason that jam,jelly, and honey don't spoil easily is that the high ___ ___ outside the cell causes bacteria to dehydrate and die.
    Osmotic Pressure
  32. ___ anaerobes are bacteria that connot survive in the presence of atmospheric O2 while ___ aerobes are bacteria that must have atmospheric O2 to survive.
    Obligate
  33. A ___ is a bacterium that grows in a pH range of 5 to 8, with 7.0 to 7.2 as optimum.
    Neutrophile
  34. A bacterium described as an ___ ___ cannot lice in the presence of atmospheric O2 because it is toxic to it.
    Obligat Anaerobe
  35. The ___ phase of the bacterial growth curve is when bacteria are at their healthiest and are most typical.
    Log
  36. Photo- and chemo- are prefixes that indicate an organisms source of ____.
    Energy
  37. A solution with more H+ ions than OH- ions has a pH value bellow 7 and is referred to as ___.
    Acidic
  38. The prefix ___ refers to tan organism that obtains its energy from the sun.
    Photo
  39. The term nutrition refers to how an organism obtains both energy and ___ compound.
    Carbon
  40. Bacterial "___" refers to an increase in thenumber of cells in the population, not to individual size as in plants or animals.
    Growth
  41. ___ ___ refers to the number of living organisms any particular environment can support.
    Carrying Capacity
  42. Generation time is the time required for one bacterial cell to produce two new daughter cells. (Also called ___ time, it averages 20 minutes under optimum condition).
    Doubling
  43. A ___ ___ is a bacterium that would prefer to have oxygen for respiration, but can do without it by fermenting.
    Facultative Anaerobes
  44. With regard to the salt concentration, a bacterium that lives in the ocean is a ____.
    Halophile
  45. An organism that only consumes animal matter is termed a ___.
    Carnivore
  46. All organisms have a temperature and pH ___ in which they can exist; there is a minimum at one end and a maximum at the other end.
    Range
  47. Although both living and dead cells are counted , the ___ ___ test to measure bacterial growth involves passing a beam of light through a bacterial suspension to a photodetector.
    Optical Density
  48. Binary fission refers to the method of cell division of bacteria; one parent cell gives rise to two genetical identical ____ cells.
    Daughter
  49. Archaebacteria that are extreme halophiles live in places such as the Dead Sea and ___ ___ ___, where salt concentrations are from 10-30%.
    Great Salt Lake
  50. A ___ is a bacterium that requires a temperature range of 20°C-50°C (such as environmental bacteria and human pathogens).
    Mesophile
  51. The ___ phase of the bacterial growth curve is when lab testing should be down and when antibiotics are most effective.
    Log
  52. The ___ ___ method to measure bacterial growth only counts "live" cells, but takes at least one day. It is based on the premise that each bacterial cell will multiply to form one visible colony on agar.
    Plate Count
  53. The ___ temperature or pH refers to that which a particular organism grows at its very best and tastes rate.
    Optimum
  54. When performing an optical density test to estimate bacterial population size, the fewer cells there are in the bacterial suspension, the ___ light will pass through without being scattered.
    More

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