This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following is NOT a propey of the Signal Recognition Paicle (SRP)? 
Select and explain. 
A. Contains RNA and several polypeptides, B. Contains a single peptidase activity, C. Temporarily arrests translation, D. Binds to the signal sequence of secretory proteins
B: Contains a single peptidase activity
Answer: B: Contains a single peptidase activity 
Explanation: This is not a correct statement about SRP and hence is the correct answer to this question. SRP does not have peptidase activity. The signal sequence is removed from secretory proteins by a signal peptidase located within the RER.