Task: Question Answering
Input (English): Question: All of the following statements that describe restriction endonucleases are true EXCEPT: 
 Options:  <1> They do not provide single chain ends in complementary pieces of DNA. <2> They are limited by the methylation of the recognition sequences. <3> They recognize palidromic sequences. <4> They break both chains in the DNA duplex. <5> They are specific to short symmetric sequences.
Output (English): 1