Practical2 Flashcards
(66 cards)
Amylase Test Test for?
? amylase enzyme which hydrolysis starch into glucose subunits
Amylase Test Medium
Starch agar appears clear transparent iodine regents to visualize
Amylase Test + vs -
+ clear - Brown
Lipase Tests For?
lipase which hydrolysis tributyrin into glycerol and three fatty acids
Lipase Test Medium
Tributyin agar(cloudy with water)
Lipase + or -
clear + and cloudy -
Gelatinase Test Tests For?
gelantinase which hydrolyses gelatin into amino acid subunits
Gelatinase Test
Medium gelatin agar(cloudy with water)
Gelatinase + or -
clear + and cloudy -
Catalase Test Test for
catalase which breaks down hydrogen peroxide into h20 and o2
Catalase Test Medium
hydrogen peroxide
Catalase + or -
bubbles + and no bubbles -
Oxidase Test For?
Cytochrome c oxidase which is the last component of the electron transport chain
Oxidase Test Medium
BBL Dry Slide(oxidase slide)
Oxidase Test + or -
Purple within 20sec + and no color change or light gray is -
Nitrate Reduction Tests for?
N2 Nitrate reductase(ability to reduce nitrate to n2 gas) also test for denitritrication
Nitrate Reduction Medium
Nitrate Broth test tube
Nitrate Reduction Test + or -
Bubble + add reagents sulfuric acid and Tromsdorff if turn purple brown then + and - no bubble and yellow
Fermentation of Carbohydrates Test for which 3 sugars
glucose lactose and sucrose
Fermentation of Carbohydrates Medium
Fermentation broth with glucose; lactose and sucrose
Fermentation of Carbohydrates test results (A; AG; NC; K)
A-Acid(yellow) AG-Acid Gas(yellow and gas in tube) NC- no change or neutral green K- Alkaline(blue)
Methyl Red Voges prokauer(MR-VP) Test for?
Two different glucose fermentations pathways MR- mixed acid pathway VP for 2;3 butanediol pathway
MR-VP Medium
MR-VP broth
MR-VP Test Results
MR = Red + and yellow - VP = yellow dark +(20m) and yellow copper -