Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing Schools Business

Features Pricing Schools Business

Bacterial Pigments and Biochemical Tests Quiz

10 Questions

0 Views

Bacterial Pigments and Biochemical Tests Quiz

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

Which of the following is an example of a water-insoluble pigment produced by nonfermenters?

Flavins

Melanins

Carotenoids (correct)

Quinones

What is the purpose of adding a layer of sterile mineral oil to one of the tubes?

To prevent bacterial growth

To create aerobic conditions

To enhance pigment production

To create anaerobic conditions (correct)

If the medium in the anaerobic tube turns yellow, what does it indicate?

The bacteria are producing pigments

The bacteria are motile

The bacteria are fermenting glucose (correct)

The bacteria are oxidizing glucose

Which pigment is described as having a violet or purple color?

Violacein (B) Signup and view all the answers

What is the purpose of using a semisolid agar medium for testing motility?

To observe the motility of bacteria (C) Signup and view all the answers

Which of the following is an example of a water-soluble pigment?

Pyocyanin (A) Signup and view all the answers

What is the recommended timeframe for making an initial reading of motility in the semisolid agar medium?

Within 4 to 6 hours (C) Signup and view all the answers

Which pigment is described as having a red or maroon color?

Phenazines (A) Signup and view all the answers

If the tube without oil turns yellow, but the tube with oil does not, what does it indicate?

The bacteria are oxidizing glucose (D) Signup and view all the answers

Which method is suggested as potentially more accurate for detecting motility of nonfermentative bacilli?

Hanging-drop preparation (D) Signup and view all the answers