Which of the following sequences in double-stranded DNA is most likely to be recognised as a cutting site for a restriction enzyme?
A) AAGG TTCC
B) GGCC CCGG
C) ACCA TGGT
D) AAAA TTTT

Question

Quizplus · Accepted Answer

Restriction enzymes typically recognize a specific sequence of nucleotides, called a recognition site, and cut the DNA at or near the site. The sequence "GGCC" is a common recognition site for many restriction enzymes, so sequence B, "GGCC CCGG," is the most likely to be recognized as a cutting site. Sequences A, C, and D do not match any known recognition site for restriction enzymes.

Which of the Following Sequences in Double-Stranded DNA Is Most