DNA is a double helical structure made up of nucleotides, nitrogenous bases, and sugar-phosphate backbone. In the given image of DNA, the arrow represents the hydrogen bonds between complementary nucleotides.
The DNA codes the genetic information and is double stranded. It is found in the nucleus of the eukaryotic cell. The DNA is made up of sugar molecule, base pairs, and phosphate backbone. The base pairs, purines and pyrimidines are connected twistedly to dive DNA its helical structures.
The bonds of base pairs are:
- The adenine will bind with thymine by two hydrogen bonds.
- The guanine will bind with cytosine by three hydrogen bonds.
Thus, the two complementary bases of DNA hold together the DNA by hydrogen bonds.
Therefore, option C is correct.
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