
Coliform Bacteria Testing Procedures
Interactive Video
•
Biology
•
9th - 10th Grade
•
Practice Problem
•
Hard
Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary role of E. coli in the intestines of endotherms?
To cause digestive distress
To produce toxins
To aid in food digestion
To act as a pathogen
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which strain of E. coli is known to be pathogenic and can cause severe health issues?
B2
K12
C600
O157:H7
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is E. coli used as an indicator species in water testing?
It is the only bacterium found in water
It is the least harmful bacterium
It is the most dangerous bacterium
It is easy to detect and indicates the presence of other pathogens
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the membrane filter technique in water testing?
To purify water
To measure water temperature
To detect the presence of coliform bacteria
To remove all bacteria from water
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What color do total coliform bacteria colonies appear after incubation?
Yellow
Green
White
Blue or red with a metallic sheen
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in preparing samples for coliform analysis?
Incubating the samples
Labeling the petri plates
Counting bacterial colonies
Pouring nutrient broth
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to not turn on the suction pump before pouring the sample into the filter?
It will contaminate the sample
It will make the sample too cold
It will result in clumps of bacteria instead of individual colonies
It will cause the filter to break
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