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'

Subtopic:  Restriction Enzymes - Main Enzymes |
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Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so, special shown in it? 
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

Subtopic:  Tools: Enzymes: II | Restriction Enzymes - Main Enzymes | Tools |
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There is a restriction endonuclease called Eco RI. What does the 'co' part in it stand for?
1.  Coelom
2.  Coenzyme
3.  Coli
4.  Colon
Subtopic:  Restriction Enzymes - Main Enzymes |
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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'
Subtopic:  Restriction Enzymes - Main Enzymes |
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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 

Subtopic:  Restriction Enzymes - Main Enzymes |
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The linking of the antibiotic resistance gene with the plasmid vector became possible with:

1. DNA ligase

2. endonucleases

3. DNA polymerase

4. exonucleases

Subtopic:  Tools: Enzymes: II | Restriction Enzymes - Main Enzymes | Separation and Isolation of DNA fragments | Tools |
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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

Subtopic:  Restriction Enzymes - Main Enzymes |
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