Palindrome Sequences

Q. Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?

1. 5' ___ GATATG ___ 3'
   3' ___ CTACTA ___ 5'
2. 5' ___ CG TTCG ___ 3'
   3' ___ ATGGTA ___ 5'
3. 5' ___ GAATTC ___ 3'
   3' ___ CTTAAG ___ 5'
4. 5' ___ CACGTA ___ 3'
   3' ___ CTCAGT ___ 5'

Q. Given below is a short sequence of DNA describing the base pairs on each strand of DNA. What is so special about it?
5’___ GAATTC ___ 3’
3’ ___ CTTAAG ___ 5’

1. Replication completed
2. Deletion mutation
3. Start codon at the 5’ end
4. Palindromic sequence of base pairs

Q. Which of the following DNA sequences qualifies to be designated as a palindrome?

1. 5’ – GACCAG – 3’ in one strand
2. 3’ – GACCAG – 5’ in one strand
3. 5’ – GACGAC = 3’ , 3’ – CGGGTC – 5’
4. 5’ – AGCGCT – 3’ , 3’ – TCGCGA – 5’