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20 Cards in this Set
- Front
- Back
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Yeast are _____________ unicelluar fungi.
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Nonfilamentous
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Are yeast unicellular or multicellular?
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Unicelluar
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How many times bigger are yeast compared to bacteria?
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5 to 10 time bigger
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What 3 shapes can yeast show?
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1. Ellipsoidal
2. Spherical 3. Cylindrical |
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Unlike molds, yeast do not have what 2 things?
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1. Aerial hyphae
2. Supporting sporangia |
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Yeast reproduce what?
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Asexually by budding or fission
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What 2 types of asexual reproduction does yeast exhibit?
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Budding or fission
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Describe budding reproduction.
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Asymmetrical; a bud forms (daughter cell) from the parental cell
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Describe fission reproduction.
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Symmetrical; parental cell elongates and splits into 2 daughter cells
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What genus of yeast exhibits fission reproduction?
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Schizosaccharomyces
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True or False:
Some yeast can undero sexual reproduction |
True - when 2 sexual spores conjugate giving rise to a zygote (diploid cell)
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What are the steps to sexual reproduction of yeast?
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1. 2 sexual spores conjugate and create zygote or diploid cell
2. Nucleus divides by meiosis and 4 new haploi nuclei called ascospores are created |
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Haploid nuclei are also called what?
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Ascospores
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What is the structure called that contains ascospores?
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Ascus
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What is used as a leavening agent in dough?
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Saccharomyces cervisiae "bakers yeast"
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What 2 strains of yeast are used for brewing?
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Saccharomyces carlsbergensis & cerevisiae
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What is used for the fermentation of grape wine?
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Saccharomyces elipsoideus
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What is the vaginal infection of yeast called?
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Moniliasis
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What is the oral infection of yeast called?
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Thrush
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What are the 2 types of yeast that were observed through the microscope?
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Saccharomyces cervisiae
Candida albicans |
