Metro Micro Final lab prac

Select all that are true of these plates

• Are starch plates

• Are EMB plates

• Plate B indicates the presence of amylase and maltase

• Plate B indicates the presence of citrate permease

• Plate A indicates the presence of cysteine desulfurase.

The tube in this image indicates the bacterium

• produces cytochrome oxidase

• produces gelatinase

• produces cysteine desulfurase

• produces Lysine decarboxylase

• produces urease

The tube turned black due to the

• production of ammonia

• Kovac's reagent reacting with indole

• production of cadaverine

• production of H2S that mixes with iron

Tags

NGSS.HS-PS1-2

Which of the following indicate positive results for lysine decarboxylase?

• A

• B

• C

• D

• E

Select all that are true of the lysine decarboxylase test.

• results in CO2 and cadaverine

• results in ammonia production

• results in acid production

• is performed in the presence of oxygen

• is performed in the absence of oxygen

Which of the following indicates a positive urease test?

• A

• B

Tube B is pink due to

• digesting urea into ammonia

• digesting amino acids into cadaverine

• digesting cysteine into H2S

• digesting starch into glucose

Tags

NGSS.HS-PS1-2

If gelatin remains liquid after 10 min on ice, this indicates the bacterium has gelatinase.

• True

• False

Select all that are true of the mannitol salt agar plate.

• Selects for Gram (+)

• Selects for halotolerants

• Differentiates based on lactose fermentation

• Differentiates based on mannitol fermentation

• Differentiates based on hemolysis

Which of the following is a positive result for the mannitol salt agar plate?

• A

• B

• C

• D