Microbiology MR/VP

6 Written Questions

1. 
   What does the maroon band at the top of the Vogues Proskauer broth indicate?
2. What are the ingredients in the MR and VP?
3. 
   What is a positive indication in the VP Test?
4. How are the MR and VP tests alike?
5. 
   What is the purpose of the VP Test?
6. 
   What is the name of this test?

6 Multiple Choice Questions

1. 
   When the acetic acid is converted to acetylmethylcarbinol, what is the pH of the broth for the Vogues Proskauer test?
   1. pH = 4.4 or less
   2. Methyl Red
   3. pH = 6.2
   4. Vogues Proskauer
2. 
   When the single acid detected by the VP test is neutralized, what is it converted into?
   1. Vogues Proskauer
   2. Acetylmethylcarbinol
   3. Acetylmethylcarbinol (AMC)
   4. Methyl Red
3. 
   What is the name of this test?
   1. Methyl Red
   2. pH = 4.4 or less
   3. pH = 6.2
   4. Vogues Proskauer
4. What are the possible end products for the MR test?
   1. A positive result for the production of acetic acid.
   2. Acetic Acid
      Formic Acid
      Lactic Acid
   3. Formic Acid
      Lactic Acid
      Acetic Acid
   4. Alpha-Napthol
      40% KOH
5. 
   What is a positive reaction for the MR test?
   1. Formic Acid
      Lactic Acid
      Acetic Acid
   2. A positive result for the production of acetic acid.
   3. Red coloration after the addition of the Methyl Red reagent and mixing
   4. Maroon band at the top of the broth
6. 
   What does Barritt's Reagent A and Reagent B react with in the Vogues Proskauer broth when the broth turns red?
   1. Acetylmethylcarbinol
   2. Acetylmethylcarbinol (AMC)
   3. pH = 4.4 or less
   4. Methyl Red

6 True/False Questions

1. pH = 4.4 or less →
   When the acetic acid is converted to acetylmethylcarbinol, what is the pH of the broth for the Vogues Proskauer test?

   True        False

2. Barritt's Reagent A (Alpha-napthol)
   Barritt's Reagent B (40% KOH) →
   What must be added to the VP broth to show a reaction?

   True        False

3. Detect bacteria which will ferment glucose to form multiple acids and overcome the phosphate buffer →
   What is the purpose of the VP Test?

   True        False

4. Alpha-Napthol
   40% KOH →
   What is Barritt's Reagent A and Reagent B that is added to Vogues Proskauer test?

   True        False

5. Formic Acid
   Lactic Acid
   Acetic Acid →
   What are examples of acids which can be produced by a bacteria and detected by the Methyl Red test?

   True        False

6. The MR test requires the addition of a pH indicator called Methyl Red.
   The VP test requires the addition of two reagents to bring about a color change. →
   What is a positive reaction for the MR test?

   True        False