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Q. No.Which of the following enzymes catalyse the removal of nucleotides from the ends of DNA?
1. endonuclease
2. exonuclease
3. DNA ligase
4. Hind - Il
Subtopic: Restriction Enzymes - Main Enzymes |
89%
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‘Restriction’ in restriction enzyme refers to
| 1. | cleaving of phosphodiester bond in DNA by the enzyme |
| 2. | cutting of DNA at specific position only |
| 3. | prevention of the multiplication of bacteriophage by the host bacteria |
| 4. | All of the above |
Subtopic: Restriction Enzymes - Main Enzymes |
From NCERT
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Which of the following statements does not hold true for restriction enzymes?
| 1. | It recognises a palindromic nucleotide sequence |
| 2. | It is an endonuclease |
| 3. | It is isolated from viruses |
| 4. | It produces the same kind of sticky ends in different DNA molecules |
Subtopic: Restriction Enzymes - Main Enzymes |
83%
From NCERT
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