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27 May, 04:11

When a DNA molecule replicates, a. The hydrogen bonds along the sugar-phosphate chain are broken. b. The covalent bonds along the sugar-phosphate chain are broken. c. The hydrogen bonds between the nitrogenous base pairs are broken. d. The covalent bonds between the nitrogenous base pairs are broken.

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  1. 27 May, 04:25
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    C

    Explanation:

    The DNA chain breaks the hydrogen bonds between nitrogenous bases when it replicates so that the bases are exposed to DNA polymerase. Breaking the backbone would ruin the molecule.
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