Carbohydrate Fermentation Tests
20 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary function of carbohydrate fermentation tests?

  • To identify the type of bacteria
  • To determine the presence of enzymes in bacteria
  • To provide energy to bacteria (correct)
  • To break down gelatin into glucose

What is the indicator used in the carbohydrate fermentation tests?

  • Amylase
  • Gelatin
  • Gram's Iodine
  • Phenol Red (correct)

What is the result of a positive gelatinase test?

  • No liquefaction of gelatin
  • Production of acid
  • Production of gas
  • Liquefaction of gelatin (correct)

What is the purpose of adding Gram's Iodine solution to the starch agar plate in the amylase test?

<p>To detect the presence of starch (A)</p> Signup and view all the answers

What is the result of a negative amylase test?

<p>No clear halo around the colony (D)</p> Signup and view all the answers

What is the medium used in the carbohydrate fermentation tests?

<p>Glucose PRB (C)</p> Signup and view all the answers

What is the purpose of the peptone in the carbohydrate fermentation tests?

<p>To change the color of the medium (C)</p> Signup and view all the answers

What is the significance of a pH decrease in the carbohydrate fermentation tests?

<p>The bacteria have produced acid (A)</p> Signup and view all the answers

What is the result of a positive carbohydrate fermentation test?

<p>Acid or gas is produced (D)</p> Signup and view all the answers

What is the purpose of using the '2/3 of needle' technique in the exoenzyme tests?

<p>To inoculate the medium with bacteria (D)</p> Signup and view all the answers

What is the primary function of the enzyme urease in the Urease Test?

<p>To produce ammonia (D)</p> Signup and view all the answers

What is the purpose of adding 3% H2O2 in the Oxidase Test?

<p>To detect the production of cytochrome C oxidase (B)</p> Signup and view all the answers

In the Catalase Test, what is the purpose of rubbing the applicator tip on a well-isolated colony?

<p>To release the enzyme catalase from the bacteria (D)</p> Signup and view all the answers

What is the significance of a positive Indole Test result?

<p>The bacteria can produce tryptophanase (A)</p> Signup and view all the answers

What is the primary function of the enzyme citritase in the Citrate Test?

<p>To utilize citrate as a carbon source (D)</p> Signup and view all the answers

What is the purpose of the Methyl Red Test?

<p>To detect mixed acid fermentation (B)</p> Signup and view all the answers

What is the significance of a positive Hydrogen Sulfide Test result?

<p>The bacteria can produce hydrogen sulfide gas (A)</p> Signup and view all the answers

What is the purpose of the TSA Plate in the Catalase Test?

<p>To provide a medium for the growth of bacteria (B)</p> Signup and view all the answers

What is the purpose of the IMViC tests?

<p>To determine the genus of bacteria (D)</p> Signup and view all the answers

What is the significance of a negative Oxidase Test result?

<p>The bacteria cannot produce cytochrome C oxidase (B)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser