Question 1.

Restriction enzyme sites are usually comprised of even-number base sequences. This occurs because of a characteristic in their structure, which was studied on Week 1 of the lectures. With this particular structure in mind, which of the following DNA sequences could be a restriction enzyme site?

A) AGGCTCAG
B) ATCTA
C) ATCCGGAT
D) AGCTCGTGCT
E) None of the above

(Original idea by: Celso A. W. Santos)