During the Synthesis of Proteins on the Rough Endoplasmic Reticulum

question 66

Multiple Choice

During the synthesis of proteins on the rough endoplasmic reticulum (RER) signal peptidase cleaves the hydrophobic signal sequence

• A) immediately after signal recognition protein (SRP) is bound.
• B) when the SRP docks with the SRP receptor.
• C) simultaneously with the release of the ribosome.
• D) as the polypeptide chain is translocated through the membrane.
• E) as the protein is secreted through the plasma membrane.

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