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Microbiology Quiz on Identification Tests

10 Questions

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Microbiology Quiz on Identification Tests

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Questions and Answers

What indicates a positive coagulase test result in the slide and tube tests?

A color change to dark blue

No clumping observed

Bubbles forming upon adding Hydrogen Peroxide

Clumping observed (correct)

Which component is used in the Oxidase Test as a final electron acceptor?

N, N, N, N-Tetramethyl Phenylenediamine Dihydrochloride (correct)

Ferrous sulfate

Oxygen

Nitrogen

What is the purpose of bile salts in Bile Esculin Agar?

To selectively restrict the growth of some gram-positive organisms (correct)

To act as an energy source for microorganisms

To promote the growth of all gram-positive organisms

To inhibit the growth of specific gram-negative organisms

What is indicated by bubbling when bacteria are added to Hydrogen Peroxide?

The bacteria are catalase positive Signup and view all the answers

Which of the following statements about Esculin is true?

Esculin hydrolysis leads to a loss of fluorescence in the medium Signup and view all the answers

What color indicates a positive result in the Oxidase test?

Purple Signup and view all the answers

Which reagent is essential for performing the Gram Stain?

Acetic Alcohol Signup and view all the answers

What is the incubation temperature for the Bile Esculin test?

37 degrees Celsius Signup and view all the answers

In the Slide & Tube Coagulase test, what material is mixed with the bacterium culture?

Rabbit Plasma Signup and view all the answers

Which step is performed last when conducting a Gram Stain?

Application of Safranine Signup and view all the answers