
Microbiology - Lab 8-9
Authored by df cv
Science
University

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23 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the streak plate technique?
To observe individual colonies
To dilute a bacterial sample
To differentiate mixed vs pure cultures
All of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which agar is selective for Gram-positive halotolerant bacteria?
Nutrient Agar (NA)
Mannitol salt agar (MSA)
Eosin methylene blue (EMB)
None of the above
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which agar is differential based on color changes if mannitol sugar is fermented?
Nutrient Agar (NA)
Mannitol salt agar (MSA)
Eosin methylene blue (EMB)
None of the above
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which agar contains eosin and methylene blue and is selective for Gram-negative bacteria?
Nutrient Agar (NA)
Mannitol salt agar (MSA)
Eosin methylene blue (EMB)
None of the above
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which agar differentiates Gram-negative lactose fermenters from Gram-negative non-fermenters based on colony color?
Nutrient Agar (NA)
Mannitol salt agar (MSA)
Eosin methylene blue (EMB)
None of the above
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which agar is not selective or differential?
Nutrient Agar (NA)
Mannitol salt agar (MSA)
Eosin methylene blue (EMB)
None of the above
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Look at the MSA plate result below and answer: is the bacteria growing on the plate a Gram-positive halotolerant?
No
Yes
Can't determine
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