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Q.

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.

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