BIO 250 Lab Quiz 4 _Straighterline

Question 1

After plating bacterial samples onto MacConkey and Nutrient Agar, you obtained the following
results:




Which sample(s) contain(s) Gram-negative bacteria that are unable to ferment lactose?
Select one:
a. B and C

b. Unable to determine from this set of results

c. A

d. D



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The correct answer is: D

Question 2

Beef extract can be added to complex media in order to provide a source of
Select one:
a. amino acids.

b. sodium chloride.

c. polymerization agent.




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, d. essential nutrients.



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The correct answer is: essential nutrients.

Question 3


After plating bacterial samples onto MSA and Nutrient Agar, you obtained the following results:




Which bacterial sample(s) contain(s) Staphylococcus aureus?
Select one:
a. None of the above

b. Unable to determine from this set of results

c. C

d. A, B, and D


Feedback

The correct answer is: None of the above

Question 4

Which of the following lists of disease-causing agents is arranged from smallest to largest?


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