Cell Structure and Function Question
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What part does SRP (signal recognition protein) play in the binding of ribosomes to the endoplasmic reticulum?
- It binds to the mRNA first and then to the ER receptor, which closes a channel.
- It plays no real part in the binding of ribosomes to the ER.
- It signals the completion of the synthesis of ribosomal subunits and then binds to the ER.
- SRP binds first to the signal peptide on the polypeptide being synthesized and then to a receptor on the ER, which opens a channel.