What is the role of the signal recognition particle (SRP) in co-translational import of proteins into the ER?

• A. It binds to the ER signal sequence and directs the ribosome to the ER membrane.
• B. It assists in the folding of proteins once they are inside the ER.
• C. It cleaves the ER signal sequence after the protein enters the ER.
• D. It provides energy for the translocation of proteins into the ER.

Answer: (A)