Which one of the following represents a palindromic sequence in DNA?
1. | 5'-CCAATG-3' 3'-GAATCC-5' |
2. | 5'-CATTAG-3' 3'-GATAAC-5' |
3. | 5'-GATACC-3' 3'-CCTAAG-5' |
4. | 5'-GAATTC-3' 3'-CTTAAG-5' |
1. Deletion mutation
2. Start codon at the 5' end
3. Palindromic sequence of base pairs
4. Replication completed
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'-CGTTCG-3' | 2. | 5'-GATATG-3' |
3'-ATGGTA-5' | 3'-CTACTA-5' | ||
3. | 5'-GAATTC-3' | 4. | 5'-CACGTA-3' |
3'-CTTAAG-5' | 3'-CTCAGT-5' |
Restriction endonucleases are enzymes which:
1. | make cuts at specific positions within the DNA molecule |
2. | recognize a specific nucleotide sequence for binding of DNA ligase |
3. | restrict the action of the enzyme DNA polymerase |
4. | remove nucleotides from the ends of the DNA molecule |
1. DNA ligase
2. endonucleases
3. DNA polymerase
4. exonucleases
Restriction endonuclease:
1. cuts the DNA molecule randomly
2. cuts the DNA molecule at specific sites
3. restricts the synthesis of DNA inside the nucleus
4. synthesis DNA