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Campbell Biology Chapter 16-17

Question:

When translating secretory or membrane proteins, ribosomes are directed to the ER membrane by

A) a specific characteristic of the ribosome itself, which distinguishes free ribosomes from bound ribosomes.

B) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane.

C) moving through a specialized channel of the nucleus.

D) a chemical signal given off by the ER.

E) a signal sequence of RNA that precedes the start codon of the message.

Answer:

B) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane.

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Last update by mayur on 03/27/2014
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Campbell Biology Chapter 16 17
Campbell Biology Chapter 16-17
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Free Flashcard From Campbell Biology Chapter 16-17
Question: When translating secretory or membrane proteins, ribosomes are directed to the ER membrane by A) a specific characteristic of the ribosome itself, which distinguishes free ribosomes from bound ribosomes. B) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane. C) moving through a specialized channel of the nucleus. D) a chemical signal given off by the ER. E) a signal sequence of RNA that precedes the start codon of the message.
Answer: B) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane.