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Answer.

(a) DNA his tone protein coat is removed so as to allow easily breakdown (separation) of double strand.

(b) By the influence of enzyme helicase hydrogen bond which held together complementary base pair are breakdown to allow frr exposition if base pair.

(c) Free nucleoside triphosphate found in the nucleoplasm are added simultaneously by the influence of DNA polymerase considering a base pairing rules.

(d) One old stand link together with a newly formed strand to firm double strand by the help of DNA lipase till a complete DNA molecules is formed.

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