Basic Microbiology Quiz On Organisms

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Quizzes Created: 1 | Total Attempts: 352

Questions: 10 | Attempts: 352 | Updated: Mar 22, 2023

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Basic Microbiology Quiz On Organisms - Quiz

This quiz is designed to ask questions related to the course of UTHSC's Medical Technology Microbiology III.

Questions and Answers

1.

Birdseed Agar is the best media that allows for differentiating and enrichment of what organism?
- A.
  
  Candida krusei
- B.
  
  Cryptococcus Neoformans
- C.
  
  Rhodotorula
- D.
  
  Candida dubliniensis
Correct Answer
B. Cryptococcus Neoformans

Explanation
Birdseed Agar is a specialized media that is used for the differentiation and enrichment of Cryptococcus Neoformans. This agar contains specific nutrients and additives that promote the growth of Cryptococcus Neoformans while inhibiting the growth of other organisms. By using Birdseed Agar, researchers can create an optimal environment for the growth and identification of Cryptococcus Neoformans, making it the best media for differentiating and enriching this particular organism.

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2.

The Dermatophyte Test uses several different additives to make it selective and differential for Dermatophytes. Which of the following does not belong?
- A.
  
  Chloramphenicol
- B.
  
  Gentamicin
- C.
  
  Cyclohexamide
- D.
  
  Vancomycin
- E.
  
  A and D
Correct Answer
D. Vancomycin

Explanation
The Dermatophyte Test uses several different additives to make it selective and differential for Dermatophytes. Vancomycin does not belong because it is an antibiotic that primarily targets gram-positive bacteria, not fungi like Dermatophytes. The other additives mentioned - Chloramphenicol, Gentamicin, and Cyclohexamide - are commonly used in the Dermatophyte Test to inhibit the growth of bacteria and other fungi, allowing for the selective growth of Dermatophytes.

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3.

Which of the following is/are responsible for inhibiting bacterial growth in the Dermatophyte Test?
- A.
  
  Chloramphenicol
- B.
  
  Cycloheximide
- C.
  
  Gentamicin
- D.
  
  Vancomycin
- E.
  
  More than one of the above.
Correct Answer
E. More than one of the above.

Explanation
The correct answer is "More than one of the above." The Dermatophyte Test uses multiple agents to inhibit bacterial growth. Chloramphenicol, cycloheximide, gentamicin, and vancomycin are all responsible for inhibiting bacterial growth in this test. These agents are added to the culture media to prevent the growth of bacteria while allowing the growth of dermatophytes, which are the fungi being tested for.

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4.

Candida albincans has a definitive test where it is incubated at 37 Degrees Celsius for 3 hours, which is the test?
- A.
  
  Dermatophyte Test
- B.
  
  Urea Test
- C.
  
  Thermostable Heat Catalase
- D.
  
  Germ Tube
Correct Answer
D. Germ Tube

Explanation
The definitive test for Candida albicans is the Germ Tube test. In this test, the organism is incubated at 37 degrees Celsius for 3 hours. If the organism produces germ tubes (long, narrow projections from yeast cells), it is indicative of Candida albicans. This test helps differentiate Candida albicans from other species of Candida, as not all species produce germ tubes. The other options mentioned, Dermatophyte Test, Urea Test, and Thermostable Heat Catalase, are not specific tests for Candida albicans.

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5.

Systemic Fungus are innoculated and set up at two different temperature which are _______ Degrees Celsius and 37 Degrees Celsius.
- A.
  
  30
- B.
  
  40
- C.
  
  20
- D.
  
  4
Correct Answer
A. 30

Explanation
30 Degrees Celsuis is also room temperature.

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6.

Cunninghamella has specific features that allow it to be differentiated while under the microscope, but what feature macroscopically will lead you in the right direction but not "call the species"?
- A.
  
  Its ability to grow quickly.
- B.
  
  The fact it turns orange on agar.
- C.
  
  It produces a fresh cut grass smell.
- D.
  
  None of the above.
Correct Answer
A. Its ability to grow quickly.

Explanation
The correct answer is its ability to grow quickly. While Cunninghamella may have specific features that can be observed under a microscope, such as the presence of sporangia or sporangiophores, these features cannot be determined macroscopically. However, the ability of Cunninghamella to grow quickly can be observed and used as a general characteristic to differentiate it from other species.

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7.

A subcutaneous mycosis can be obtained thru a superficial swab of the wound. True or False?
- A.
  
  True
- B.
  
  False
- C.
  
  I have no clue, so I am putting this because I am crazy and do not want to take a 50/50 shot at it!
Correct Answer
B. False

Explanation
A subcutaneous mycosis is a fungal infection that affects the deeper layers of the skin, tissues, and sometimes bones. It cannot be obtained through a superficial swab of the wound, as the infection is deeper and requires a more invasive sampling technique, such as a biopsy or culture. Therefore, the statement is false.

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8.

Rhodotorula produces a positive reaction in which of the following?
- A.
  
  Xylose
- B.
  
  RAT
- C.
  
  Urea
- D.
  
  None of the above
Correct Answer
C. Urea

Explanation
Rhodotorula produces a positive reaction in urea. This means that when Rhodotorula is exposed to urea, it exhibits a specific response or change that can be detected. This positive reaction could be in the form of a color change, gas production, or any other observable characteristic that indicates the presence of urea.

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9.

Candida glabrata is determined by a positive ________?
- A.
  
  Xylose
- B.
  
  Urea
- C.
  
  RAT
- D.
  
  None of the above
Correct Answer
C. RAT

Explanation
Candida glabrata is determined by a positive RAT test. The term "RAT" refers to Rapid Antigen Test, which is a diagnostic test used to detect the presence of specific antigens, such as proteins or carbohydrates, in a sample. In the case of Candida glabrata, a positive RAT test indicates the presence of specific antigens associated with this particular species of fungus. This test is commonly used in medical laboratories to identify and diagnose various infections caused by Candida glabrata.

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10.

Candida dubliniensis produces which of the following negatives? (which is used to differentiate it)
- A.
  
  Xylose
- B.
  
  Urea
- C.
  
  RAT
- D.
  
  None of the above
Correct Answer
A. Xylose

Explanation
Candida dubliniensis produces a negative result for Xylose. This means that when Xylose is used as a differentiating factor, Candida dubliniensis does not utilize or ferment Xylose.

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Current Version
Mar 22, 2023

Quiz Edited by
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Nov 20, 2008

Quiz Created by
Csmit161

Basic Microbiology Quiz On Organisms

Birdseed Agar is the best media that allows for differentiating and enrichment of what organism?

The Dermatophyte Test uses several different additives to make it selective and differential for Dermatophytes. Which of the following does not belong?

Which of the following is/are responsible for inhibiting bacterial growth in the Dermatophyte Test?

Candida albincans has a definitive test where it is incubated at 37 Degrees Celsius for 3 hours, which is the test?

Systemic Fungus are innoculated and set up at two different temperature which are _______ Degrees Celsius and 37 Degrees Celsius.

Cunninghamella has specific features that allow it to be differentiated while under the microscope, but what feature macroscopically will lead you in the right direction but not "call the species"?

A subcutaneous mycosis can be obtained thru a superficial swab of the wound. True or False?

Rhodotorula produces a positive reaction in which of the following?

Candida glabrata is determined by a positive ________?

Candida dubliniensis produces which of the following negatives? (which is used to differentiate it)