MCAT Question A Day - 5/18/14 - Answer!
During translation, a signal peptide is synthesized and attaches to an SRP complex in order to:
A. inactivate the new protein.
B. activate the new protein.
C. prevent the ribosome from attaching to the endoplasmic reticulum.
D. direct the ribosome to attach to the endoplasmic reticulum.
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D is correct. Signal peptides attach to SRPs to direct the ribosome to attach to a membrane such as the endoplasmic reticulum. The signal peptide is usually removed during translation.
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