Answers

2015-12-10T21:52:29+08:00
The pairing of the bases produces a long, two-stranded molecule that is often compare to a zipper. If you look at a zipper, the sides of the zipper represent the sugar and phosphate units, while the teeth of the zipper represent the pairs of nitrogenous bases of the DNA.
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2015-12-13T14:29:28+08:00
Comparing the different nitrogenous bases bond to each other in zipper pattern . you have the sugar , phosphate , and bases , and different bases line up on opposite side of the helix.
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