lab 12 Flashcards
(13 cards)
Which sugar is used for the MRVP Test?
Glucose or Lactose
What is the product of fermentation being tested for in the MR test?
mixed Acids from glucose
What is the product of fermentation being tested for in the VP test?
Acetoin
What reagent/indicator is used in the MR test?
Methyl Red
What reagent/indicator is used in the VP test?
alpha-naphthol and potassium hydroxide
What is the appearance of a positive result for the MR test?
Red
What is the appearance of a positive result for the VP test?
red ring
What is the indicator of the Carbohydrate Fermentation test?
Phenol Red Broth
What is the appearance of a positive result for carbohydrate fermentation to an acid?
Yellow
What is the appearance of a positive result for carbohydrate fermentation to a gas?
Bubble in tube
What is the appearance of a negative result for fermentation to an acid?
red
What is the appearance of a negative result for fermentation to a gas?
No bubble in the tube
What is the appearance of a positive result for fermentation to an acid?
yellow
