A) Ligases - Catalyse lengthening to telomeres
B) Topoisomerases - Holds replication fork of DNA open
C) Helicases - Unwinds the DNA helix.
D) DNA polymerase III - Synthesis nucleotides onto lagging strands
Correct Answer: C
Solution :
(i) Ligases enzyme seals the two fragments of DNA by forming phosphodiester bond. (ii) DNA polymerase-l has 5?-3?exonuclease activity. (iii) DNA polymerase-III is main repricatingenzyme used for the synthesis of DNA strand. (iv) Halicase unwind the DNA helix. (v) Topoisomerases relive accumulated unwindings in DNA. DNA polymerase-III is the main replicating enzyme.
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