TRUE / FALSE
Nitrogen bases in opposite stands of DNA helix are joined by ionic bonds. *
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Answer:
True
Explanation:
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The nitrogenous bases are stacked in the interior in pairs,like the steps of a staircase, the pairs are bound to each other by hydrogen bonds.
The two strands of the helix run in opposite direction, so that the 5'carbon end of one strand faces the 3' carbon end of its matching stand.
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