Lecture 19 Basiodomycetes Flashcards Preview

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Flashcards in Lecture 19 Basiodomycetes Deck (7)
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1
Q

How to basidiomycetes mate

A

To be able to mate, strains must differ at mating type loci A and loci B (one strain has A1 and B1, other strain has A2 and B2). A dikaryotic mycelium is formed

2
Q

What are clamp connections

A

Clamp connection assure that, as a dikaryotic hyphae extends, new parts of the hyphae contain both nuclei

3
Q

What is an ascus (Ascomycetes)

A

A cylindrical sac in which spores of ascomycete fungi develop. Ascus’ contain 8 ascospores

4
Q

What are the 3 ascocarps (multiple asci arranged in larger structures)

A

Apothecium (high dispersal low protection)
Perithecium (average dispersal and protection)
Cleistothecium (low dispersal high protection)

5
Q

How does Saccharomyces cerevisiae change its mating type?

A

Three regulatory proteins encoded by the
Saccharomyces cerevisiae mating type locus
determine cell type by regulating the expression of
other genes

6
Q

What is a primary metabolite and give an example

A

A primary metabolite is made during and as part of growth and an example is ethanol in Saccharomyces Cerevisiae

7
Q

What is a secondary metabolite and give an example

A

A secondary metabolite is made after growth and an example is penicillin in penicilium