VL5 Reproduction of Pros Flashcards

1
Q

How do rods and cocci perform cell division

A

rods: Längenwachstum+Septenwachstum! orchestrated by the formation of divisom. Fts protein mediated division with FtsZ-ring around the center of cell. Toghether with FstZA controls synthesis of sidewall ( elongation) and the crosswall(septation).

Cocci: Also FtsZ mediated. Septenwachstum!
-wachstumszone um septum stellt sicher, dass die runde form erhalten bleibt.
-Abschnürrung nach Verdoppelung des Volumens

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2
Q

What is a generation time

A

time required for microbial cells to double in number

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3
Q

How can the formation of diplo, strepto- and staphylococci be explained

A

Nach Zellteilung bleiben Zellen noch verhaftet mit einander sie trennen sich nicht komplett. Nach Erneute Zellteilung führt größerer Zellzahlaglomeration. (Organisationsmuster)

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4
Q

What are endospores

A

-Es entsteht nur 1 Tochterzelle
-Zellteilung nicht in Zellmitte
-äußerst stabile Zellwandstruktur
-sehr stabile Zellen gegen außenstress
-Überdauerungsform bei Bakterien bezeichnet, die sich, im Gegensatz zu Exosporen, innerhalb des Bakteriums bildet

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5
Q

How do endospores differ from vegetative cells?

A

sehe Bilder

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6
Q

How are endospores formed? Which steps are involved?

A

5 Schritte (sehe Bilder)

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7
Q

How would a schematic drawing of an endospore look like?

A

Exosporium, spore coat, cortex, core

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8
Q

Why are endospores so resistant against harsh conditions?

A

wenig H20, starke Hülle (schwere Durchlässigkeit für Medikamente), geringe pH (Enzymaktivität)

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9
Q

Why can endospores be dangerous?

A

medical significance: wenig H20, starke Hülle (schwere Durchlässigkeit für Medikamente), geringe pH (Enzymaktivität) =>hitze resistenz!
Toxin release!(Clostidium tetani, Basillus anthracis)

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10
Q

Bei welchen Bakterien Endosporen?

A

Bacillus, Clotridien

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