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QUESTION 2 Which of the following bacteria is found in yogurt? a. Lactobacillus acidophilus b. Staphylococcus...

QUESTION 2

  1. Which of the following bacteria is found in yogurt?

    a.

    Lactobacillus acidophilus
    b.

    Staphylococcus aureus
    c.

    E. coli
    d.

    Mycobacterium

QUESTION 7

  1. Which of the following is FALSE regarding violet red bile (VRB) agar?

    a.

    it is not selective for coliforms
    b.

    all are correct
    c.

    it is used to determine the total coliform count in milk
    d.

    it is selective for coliforms

QUESTION 20

  1. Snyders media detects

    a.

    Mycobacteria
    b.

    coliforms
    c.

    Enterobacter
    d.

    Lactobacillus acidophilus
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Homework Answers

Answer #1

2. Lactobacillus acidophilus (these species that eat sugars in milk,so they produces lactic acid )

7. it is not selective for coliform bacteria (false) - VRB is used as a selective medium to detect and enumerate lactose fermenting coliform bacteria.

20. Synders media is used to detect Lactobacillus acidophilus . Synder test is based on thre rate of acid production by acidogenic microorganisms . it is a calorimetric test for evaluating caries activity or susceptibillity.

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