Biochemical Tests Quiz

What does the Catalase Test detect?

• Catalase enzyme

• Cytochrome c oxidase enzyme

• Coagulase enzyme

• Gelatinase enzyme

What indicates a positive result in the Oxidase Test?

• Bubbles appear

• Purple color

• Clot formation

• Gelatin liquefies

What does a positive Coagulase Test indicate?

• Clot formation

• No clot formation

• Gelatin liquefies

• Bright pink color

What does the Gelatinase Test check for?

• Gelatin liquefies

• Clot formation

• Bubbles appear

• Purple color

What does a positive Urease Test indicate?

• Bright pink color

• Yellow color remains

• Clot formation

• No red layer

What does a positive Citrate Test indicate?

• Blue color

• Green color remains

• Red layer at surface

• No color change

What does a positive Indole Test indicate?

• Red layer at surface

• No red layer

• Bright pink color

• Clot formation

What does the Litmus Milk Test indicate when it turns pink?

• Lactose fermentation

• Casein coagulation

• Litmus reduction

• Uninoculated

What does a positive result for sugar fermentation in the TSI Test indicate?

• Yellow

• Cracks

• Black precipitate

• No color change

What does the API System use to identify bacteria?

• Multiple biochemical tests

• Single biochemical test

• Visual inspection

• Microscopic examination