BIO 250 MicroLab Quiz 3_Straighterline

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Started on Tuesday, March 31, 2015, 1:08 PM
State Finished
Completed on Tuesday, March 31, 2015, 1:32 PM
Time taken 24 mins 19 secs
Grade 24.00 out of 48.00 (50%)


Question Which quantitation methods can be used to determine the number of living

1 and dead cells in a sample?

Correct
Select one:
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a. turbidity determination and direct microscopic count
of 4.80
b. direct microscopic count and direct plate count
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question
c. filtration and direct plate count

d. filtration and turbidity determination



The correct answer is: turbidity determination and direct microscopic count




Question Which quantitation method(s) do not require bacteria to be grown on solid

2 media?

Correct
Select one:
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a. turbidity determination and filtration
of 4.80
b. turbidity determination, direct microscopic count, and most
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probable number

c. filtration, direct plate count, and most probable number

d. most probable number only




This study source was downloaded byThe correct answer
100000824189183 is: turbidity
from CourseHero.com determination,
on 04-20-2022 direct
04:48:59 GMT -05:00 microscopic count, and

https://www.coursehero.com/file/25273766/MicroLab-3-Quizpdf/

, most probable number




Question If you plate 0.1mL of a 10-2 dilution onto an agar plate and 60 colonies grow,

3 what is the population density of your original sample?

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a. 60,000 CFU/mL
of 4.80
b. 6,000 CFU/mL
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c. 600 CFU/mL
question
D.300 CFU/mL



The correct answer is: 60,000 CFU/mL




Question If there are 60 colonies present on a 10-1 serial dilution plate, approximately

4 how many colonies should be present on a 10-2
serial dilution plate?
Incorrect

Mark 0.00 out Select one:
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a. 120
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b. 6
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c. 600

d. 30



The correct answer is: 6




Question You obtain the following results after plating a serially diluted bacterial sample

5 onto four nutrient agar plates:

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of 4.80

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