M4: Module 4 Exam - Requires Respondus

M4: Module 4 Exam - Requires Respondus

LockDown Browser + Webcam AttemptTimeScore LATESTAttempt 128 minutes98 out of 100

Score for this quiz: 98 out of 100

Submitted Aug 6 at 10:30am

This attempt took 28 minutes.

Question 1

• / 2 pts

True or False: Growth media is best suited for distinguishing between two similar species of bacteria.

True

Correct!

False

Growth media is designed to simply support (and not restrict) microbial growth.

Question 2

• / 2 pts

A researcher is asked to determine which of two vials contains E coli and which contains salmonella. Knowing both are Gram-negative while only one of them is capable of fermenting lactose, which type of media would be best suited?

Selective and Differential media

Selective media

Growth media

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Correct!

Differential media

Differential media distinguishes between two, often related, microbes.

Question 3 10 / 10 pts What are the requirements of a fastidious microbe?

Your Answer:

A fastidious microbe is organism with complex growth requirements. If these growth requirements are not met, the organism will not grow. An enriched media must be to provide the correct nutrients to the organism to allow for growth.A fastidious microbe is an organism with complex growth requirements such that if absent it will not grow. Enriched medias thus contain these specific and essential nutrients required for the growth of a particular subset of microorganisms.

Question 4

• / 2 pts

True or False: LB agar is classified as a non-selective, non-differential media.Correct Answer

True

You Answered

False

Question 5

• / 5 pts

What is agar used for in microbiology?

Your Answer:

Agar is used to create a solid, smooth surface on which microbes can grow.Agar is used to create a solid, smooth surface on which microbes can grow.

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