Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Question
- The colony forming units (CFU)/ml in sauerkraut brine are given for different types of bacteria except for leuconostoc (shaded column). To obtain the Leuconostoc counts for different days, 40 microlitre of sauerkraut brine was 10-fold diluted and the CFU was determined by plating different dilutions on agar plates. For
- Day 0 56 CFU were counted in 10-1 dilution,
- Day 1 81 CFU were counted in 10-3 dilution,
- Day 2 86 CFU were counted in 10-3 dilution
- Day 5 78 CFU were counted in 10-5 dilution
Calculate the CFU/ml of leuconostoc in the brine for the 4 different days. Show your calculation
Transcribed Image Text:Section A.
Table 1 shows the summary results for a sauerkraut experiment of a researcher. Using the
data, answer the questions below.
Table 1: Summary results for a sauerkraut experiment
Day
0
1
2
5
Total aerobic plate Total Gram-
count/ml
3.5 X 107
5.6 X 106
4.3 X 107
2.9 X 107
14 3.4 X 107
35 3.1 X 105
negative count/ml
8.2 X 106
2.4 X 106
3.4 X 104
8.3 X 106
too few
to count
too few
to count
Total lactic acid
bacteria count/ml
3.4 X 10³
9.2 X 105
3.4 X 106
4.6 X 107
3.4 X 107
2.6 X 105
Leuconostoc count pH
(a) 46
(b) 71
(c) 96
(d) 68
too few
to count
too few
to count
6.7
5.7
5.0
4.4
4.3
4.4
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Follow-up Question
but why is the answers all x 1000 at the end? for example day 1 is 2.025×1000=2025CFU/ml.
should the answer not stay at 2.025?
Solution
by Bartleby ExpertFollow-up Question
are you sure? because my calculations are the same numbers but i got
Day 0: 14 CFU/ml
Day 1: 2.025 CFU/ml
Day 2: 2.15 CFU/ml
Day 5: 0.0195 CFU/ml
Solution
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