Which of the following statements correctly describes the function of a signal peptide?

Question

Quizplus · Accepted Answer

A signal peptide is a short amino acid sequence present at the N-terminal end of a newly synthesized polypeptide that targets the polypeptide to the endoplasmic reticulum (ER) for translocation across the membrane. The signal peptide binds to the signal recognition particle (SRP) and the SRP receptor, which halt translation and guide the ribosome to the ER membrane. The signal peptide is then cleaved by a signal peptidase, allowing the polypeptide to move into the ER lumen or membrane. Therefore, option D is correct as it describes the role of a signal peptide in facilitating translocation of polypeptides across the ER membrane.

Which of the Following Statements Correctly Describes the Function of a Signal