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In semi-conservative DNA replication, __________.

(A) an entirely new double helix is build using information in the sequence of amino acids.
(B) parental DNA remains intact but guides the formation of two new double helices.
(C) the parental DNA splits and free nucleotides bond to their complements, building two DNA molecules from one.
(D) parental DNA splits into small fragments and joins with newly synthesized pieces to create two double helices from one.

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Answer: Option C) the parental DNA splits and free nucleotides bond to their complements, building two DNA molecules from one.

Explanation:

In semi-conservative DNA replication,

- a parent double-stranded DNA splits in two.

- Each strand is then read by the enzyme, DNA polymerase, to ensure accurate replication of a newly synthesized strand

- the new strand contains nucleotides that are complimentary to free nucleotides present in the parent strand.

Thus, option C perfectly describes semi-conservative replication of dna

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