Which of the following methods of measuring cell density would be the best to choose when you know that you do not have a lot of bacteria present in your sample?
A) A Petroff-Hausser chamber because you are visually counting bacteria.
B) Spectrophotometry because it is sensitive to low bacterial numbers.
C) Dilution plating because you will be able to count between 30-300 cells on a plate.
D) Filtration because the number of bacteria may be concentrated on the filter prior to plating.
Correct Answer:
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Q48: Microbial cell density may be determined using
Q49: _ uses either the spread plate or
Q50: _ concentrates low numbers of bacteria before
Q51: A Petroff-Hausser chamber _.
A) uses either the
Q52: Spectrophotometry _.
A) uses either the spread plate
Q54: Which of the following methods of measuring
Q55: If the volume of growth medium trapped
Q56: Percent transmittance is equal to _.
Q57: Absorbance is equal to _. Q58: The viable cell count (cells/ml) from the
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