Yeast And Yeast-like Fungi

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| By Ngocnguyen

Ngocnguyen

Community Contributor

Quizzes Created: 1 | Total Attempts: 401

Questions: 6 | Attempts: 401 | Updated: Mar 22, 2023

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Identify yeast and yeast-like fungi

Questions and Answers

1.

What agar is used to recognized yeasts base on their growth pattern?
- A.
  
  Niger Seed
- B.
  
  Sabouraud Dextrose
- C.
  
  Brain heart infusion
- D.
  
  Cormeal
Correct Answer
D. Cormeal

Explanation
Cornmeal agar is used to recognize yeasts based on their growth pattern. Cornmeal agar provides a nutrient-rich environment for yeasts to grow and reproduce. Yeasts have specific growth patterns on this agar, which can be used to identify different species of yeasts. The other options, Niger Seed, Sabouraud Dextrose, and brain heart infusion, may also be used for yeast cultivation but do not specifically help in recognizing yeasts based on their growth pattern.

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2.

Dalmau method is used to identify what yeast?
- A.
  
  C. glabrata
- B.
  
  C. tropiclis
- C.
  
  C. albican
- D.
  
  C. krusei
Correct Answer
C. C. albican

Explanation
Dalmau method is used to identify the yeast species Candida albicans. This method involves inoculating the yeast onto a specific agar medium and observing its growth characteristics, such as colony morphology and color. By analyzing these characteristics, microbiologists can differentiate C. albicans from other Candida species, such as C. glabrata, C. tropicalis, and C. krusei. Therefore, the correct answer is C. albicans.

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3.

What yeast has cluster or pairs chlamydospores?
- A.
  
  C. guilliermondii
- B.
  
  C. dubliniensis
- C.
  
  C. neoformans
- D.
  
  C. kefyr
Correct Answer
B. C. dubliniensis

Explanation
C. dubliniensis is the correct answer because it is known to have cluster or pairs of chlamydospores. Chlamydospores are a type of asexual spore that are commonly found in certain species of yeast. C. dubliniensis is a pathogenic yeast species that is closely related to Candida albicans, and it is often associated with oral infections in immunocompromised individuals.

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4.

What term is used to describe yeast cell that is rectangular or barrel shaped, thick or thin walled, depending on the genus?
- A.
  
  Blastoconidia
- B.
  
  Chlamydoconidia
- C.
  
  Ascospore
- D.
  
  Arthroconidia
Correct Answer
D. Arthroconidia

Explanation
Arthroconidia are the term used to describe yeast cells that are rectangular or barrel-shaped, with thick or thin walls, depending on the genus. Blastoconidia refers to a type of yeast cell that reproduces by budding, chlamydoconidia are thick-walled, round or oval-shaped cells, and ascospores are sexual spores produced by fungi. Therefore, arthroconidia best fits the description given in the question.

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5.

What term is used to describe structure that septate or aseptate filament of a fungus, many together compose the mycelium?
- A.
  
  Hyphae
- B.
  
  Psedohyphae
- C.
  
  Ascus
- D.
  
  Ascospore
Correct Answer
A. HypHae

Explanation
Hyphae is the correct answer because it is the term used to describe the structure that septate or aseptate filaments of a fungus, which together compose the mycelium. Hyphae are the branching, thread-like structures that make up the body of a fungus and are responsible for absorbing nutrients and facilitating growth.

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6.

What yeast has Kinyoun stain (acid fast) positive?
- A.
  
  Rhodotorula
- B.
  
  Saccharomyces cerevisiae
- C.
  
  Geotrichum
- D.
  
  C. albican
Correct Answer
B. Saccharomyces cerevisiae

Explanation
Saccharomyces cerevisiae is the correct answer because it is a type of yeast that is Kinyoun stain (acid fast) positive. This means that when stained with Kinyoun stain, Saccharomyces cerevisiae will retain the stain and appear red under a microscope. The other options, Rhodotorula, Geotrichum, and C. albican, do not exhibit acid fast staining and would not retain the stain when subjected to the Kinyoun staining technique.

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Current Version
Mar 22, 2023

Quiz Edited by
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Nov 19, 2008

Quiz Created by
Ngocnguyen

Yeast And Yeast-like Fungi

What agar is used to recognized yeasts base on their growth pattern?

Dalmau method is used to identify what yeast?

What yeast has cluster or pairs chlamydospores?

What term is used to describe yeast cell that is rectangular or barrel shaped, thick or thin walled, depending on the genus?

What term is used to describe structure that septate or aseptate filament of a fungus, many together compose the mycelium?

What yeast has Kinyoun stain (acid fast) positive?