Zellkern, Ribosomen Flashcards

1
Q

Synonym für Zellkern?

A

Nucleus

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2
Q

Woraus besteht der Zellkern?

A

DNA
Nucleolus
Kernporen (ein- und Austritt von Proteinen)

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3
Q

Woran grenzt die Kernlamina?

A

An Innenmembran des Zellkerns

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4
Q

Wo werden Ribosomen gebildet?

A

Kernkörperchen (Nucleolus)

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5
Q

Woraus bestehen Proteine und wo sind sie aufzufinden?

A

rRNA und Proteine

Wo? entweder im Cytoplasma oder an Membran gebunden

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6
Q

Welche Membran umschlossen?

A

Doppelmembran

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7
Q

Mit welchen Zellorganell steht die Kernhülle direkt in Verbindung?

A

ER

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8
Q

Was versteht man unter Synzytium?

A

mehrkernige Zellen

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9
Q

Was wird am glatten ER produziert?

A

zelleigene Proteine ( z.B, Enzyme)

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10
Q

Was wird am rER produziert?

A

Exportproteine (z.B. Drüsensekrete, Hormone)

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11
Q

Wie werden zelleigenen Proteine abgebaut?

A

Durch Proteasomen (bestehend aus 3 UE)

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12
Q

Wo können Proteasomen aufgefunden werden?

A

Zellkern (euk.), Zytoplasma, Mitochondrien

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13
Q

Welche Sedimentationskoeffizienten haben Ribosomen eukaryotischer Zellen?

A

gr. UE= 60s
kl. UE= 40s
=> 80s

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14
Q

Welche Sedimentationskoeffizienten haben Ribosomen prokaryotischer Zellen?

A

gr. UE=50s
kl. UE=30s
=> 70s

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15
Q

Welches ist das größte Zellorganell?

A

Zellkern

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