Many restriction enzymes recognize palindromic sequences on double-stranded DNA. Among the following, which is a palindromic sequence?
A) 5'-GATTACCTAGG-3'
3'-CCTAGGTAATC-5'
B) 5'-ATTACTTTA-3'
3'-TAATGAAAT-5'
C) 5'-GCCTAGGA-3'
3'-CGGATCCT-5'
D) 5'-CTAATGGATCC-3'
3'-GATTACCTAGG-5'
E) 5'-GGATCC-3'
3'-CCTAGG-5'

Question

Quizplus · Accepted Answer

A palindromic sequence in DNA is a sequence of base pairs that reads the same in both directions. Option E, 5'-GGATCC-3' and 3'-CCTAGG-5', is a palindromic sequence because it reads the same forward on one strand as it does backward on the complementary strand.

Many Restriction Enzymes Recognize Palindromic Sequences on Double-Stranded DNA