Which amongst the following enzyme is required to remove nucleotides from the ends of the DNA ?
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a
Endonuclease
b
Exonuclease
c
DNA ligase
d
DNA polymerase
answer is B.
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Detailed Solution
Exonucleases remove nucleotides from the ends of the DNA whereas, endonucleases make cuts at specific positions within the DNA. DNA ligase is a specific type of enzyme that facilitates the joining of DNA strands together by catalyzing the formation of a phosphodiester bond. DNA polymerase, uses a DNA template to catalyse the polymerisation of deoxyribonucleotides.