Answer:
(b) Restriction enzymes belongs to a
class of enzymes called nucleases and are of two types
(i) Exo nucleases remove nucleotides
from the ends of the DNA.
(ii) Endo nucleases make cuts at
specific positions within the DNA.
DNA ligase is a sealing enzymes
(also called as genetic gum), which is responsible for joining of two
individual fragments of DNA, whereas Hind II is first discovered restriction endonuclease
enzyme.
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