BACTE REVIEW

Which among the following rapidly catalyzes the breakdown of hydrogen peroxide to water and oxygen?

• Catalase

• Peroxidase

• Oxidase

• Amidase

Which of the following is coagulase positive?

• S. saprophyticus

• S. intermedius

• S. epidermidis

• S. aureus

What is the indicator used to detect the b-naphthylamide in PYR test?

• p-aminobenzaldehyde        

• N,N-methylphenyldiamine

• N,N-methylaminocinnamaldehyde

• Alpha-naphthol

Which product of Hippurate hydrolysis is detected by the test?

• Benzoic acid

• Glycine

• Glycerol

• Hydrogen ions

Which of the following is describes the positive result for Oxidase test?

• Intense Red Color

• Deep purple/black

• Yellow

• Green Color

What substrate is hydrolyzes resulting to the formation of indole?

• Indican

• Tryptophan

• Citrate

• Carbohydrate

Which of the following is altered structurally by DNAse when complexed with DNA?

• Methylene Blue

• Toluidine blue

• Methyl Green

• Bromcresol Purple

What is the positive result for Urease test?

• Pink

• Blue

• Red

• Orange

Which of the following results is associated with oxidizers in O-F test?

• Open and closed tubes changes color to yellow

• Open tube shows changes in color at the upper portion of deep

• Neither of the tube changes during incubation

• Only the closed tube changes color

What is the indicator used for hydrogen sulfide production in TSIA?

• Ferric ammonium sulfate

• Ferrous Sulfate

• Iron (II) Sulfide

• Sodium thiosulfate