Palindrome Sequences

Q.

Is DNA always perfectly copied during DNA replication?

Q. Which one of the following is a palindromic base sequence in DNA that can be easily cut at at the middle by some particular restriction enzyme?

1. 5’-------------CATTCG--------------------3’
   3’-------------GTAAGC-------------------5’
2. 5’------------GATATG------------------3’
   3’------------CTATAC-------------------5’
3. 5’------------GAATTC-------------------3’
   3’-------------CTTAAG-------------------5’
4. 5’-------------CACGTA------------------3’
   3’-------------CTGCAT------------------5’

Q. Restriction enzymes can cleave the DNA at any site randomly.

1. True
2. False

Q. From the given options, identify the palindromic sequence containing 5’ GTT sequence.

1. 5^’ GAATTC 3^’
   3^’ CTTAAG 5^’
2. 5^’ CAGTAA 3^’
   3^’ GTCATT 5^’
3. 5^’ GTTCCA 3^’
   3^’CAAGGT 5^’
4. 5^’ GTTAAC 3^’
   3^’ CAATTG 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. Palindromic sequence of base pairs
2. Replication completed
3. Deletion mutation
4. Start codon at the 5’ end

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

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’