Yeast And Yeast-like Fungi

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

Hyphae

Psedohyphae

Ascus

Ascospore

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.

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.

2. Dalmau method is used to identify what yeast?

C. glabrata

C. tropiclis

C. albican

C. krusei

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.

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.

3. What yeast has cluster or pairs chlamydospores?

C. guilliermondii

C. dubliniensis

C. neoformans

C. kefyr

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.

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.

4. What yeast has Kinyoun stain (acid fast) positive?

Rhodotorula

Saccharomyces cerevisiae

Geotrichum

C. albican

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.

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.

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

Niger Seed

Sabouraud Dextrose

Brain heart infusion

Cormeal

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.

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.

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

Blastoconidia

Chlamydoconidia

Ascospore

Arthroconidia

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.

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.