ribosomas Flashcards

1
Q

ribosomas

A

conjunto de proteinas con RNA ribosómicos

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2
Q

donde se encuentran los ribosomas?

A

libres en el citoplasma, o anclados a la embrana del Reticulo endoplasmico y la membrana nuclear externa

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3
Q

ribosoma eucariota completo

A

80 S

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4
Q

SUBUNIDAD MAYOR DE 60 S

A

3 tipos de ARN(5s, 28 s, y 5.8 s)
49 proteinas

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5
Q

SUBUNIDAD MENOR DE 40 S

A

1 molécula de arn de 18 S
33 proteínas

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6
Q

el ribosoma se encarga de la…

A

traduccion del ARN a proteinas, ocurre en el citoplasma

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7
Q

transcripcion

A

paso de ADN a ARN, OCURRE EN EL NUCLEO

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8
Q

un ribosoma eucariona de cuantos S es?

A

80 S

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9
Q

Un ribosoma procariota de cuantos s es?

A

70 s

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10
Q

explica las diferencia del ribosoma eucariota y procariota en el esquema del cuaderno

A
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11
Q

de donde se obtienen los ARNr de 28s, 5.8s, y 18s?

A

del pre-ARNr de 45 s

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12
Q

qué hace los tres cortes del pre-ARNr 45s?

A

snoRNAs

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13
Q

estructura en forma de arbolito de navidad

A

Existen múltiples copias en tándem del gen que da lugar al pre-rRNA de 45S.
Varios de estos genes se transcriben a la par y en múltiples ocasiones de tal forma que los pre-rRNA nacientes juntoconelrDNA

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