During co-translational import, what is the role of GTP hydrolysis?

• A. It is used to cleave the ER signal sequence from the protein.
• B. It provides the energy necessary for the translocation of the protein into the ER.
• C. It is involved in the glycosylation of proteins within the ER.
• D. It assists in the folding of the protein once inside the ER.

Answer: (B)