Ribosomas Flashcards

1
Q

Definición Ribosomas

A

Estructuras basófilas compuestas de RNA y proteínas

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2
Q

Subunidades Eucariotas

A

menor: 40 s
- 33 proteínas
Mayor: 60 s
-49 proteínas

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3
Q

Subunidades Procariotas

A

menor: 30 s
- 21 proteínas
Mayor: 50 s
- 34 proteínas

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4
Q

S de Svedberg

A

Coeficiente de sedimentación en centrifugación

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5
Q

Trascrito primario del rRNA

A

45 S

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6
Q

Quién corta al 45 S?

A

sRNAC (en 3)

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7
Q

A dónde va cada pedazo de 45 s?

A

18 S –> 40 S (menor)
28s y 5.8s –> se unen con 5—> 60 S (Mayor)

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8
Q

Composición polirribosomal

A

-Polipeptido
-Subunidad menor
-Subunidad Mayor

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9
Q

Codón de inicio

A

AUG –> Metionina

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10
Q

Codones STOP

A

UAG
UGA
UAA

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11
Q

Complejo de iniciación:

A

-tRNA
-subunidad menor
-proteínas asociadas

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12
Q

Cuando se une la subunidad mayor en la traducción?

A

Cuando se encuentra el codón AUG (inicio)

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13
Q

Qué tipo de enlace une a los aminoácidos en la cadena?

A

Peptídico

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14
Q

Qué ribosomas van al citosol:

A

La que se quedan DENTRO de la célula

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15
Q

Qué ribosomas van al RER:

A

Las que se van a exportar FUERA de la membrana (golgi, lisosomas)

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16
Q

De qué transcrito viene la tRNA?

A

4s