Restriction enzymes cleave double-stranded DNA at the sites that show a particular type of symmetry: These sequences read the same on both strands and are called palindromes. Which of the following sequences is NOT a palindrome?
A)5'-AGATCT-3'
B)5'-CGGCCG-3'
C)5'-GGTACC-3'
D)5'-CCTGCAGG-3'
E)5'-CCTCAGG-3'

Question

Quizplus · Accepted Answer

Sequence E (CCTCAGG) does not read the same on both strands when aligned with its complementary strand, making it not a palindrome. The other sequences (A, B, C, D) exhibit the characteristic symmetry of palindromes.

Restriction Enzymes Cleave Double-Stranded DNA at the Sites That Show