Amodel of a dna molecule is shown below. the arrow a.) the bond between adjacent phosphate and deoxyribose molecules. b.) the junction of introns and exons in the sense strand of dna. c.) the hydrogen bond between complementary nucleotides. d.) the junction of a condon and a dna triplet.

Answer is C

The hydrogen bond between complementary nucleotides.

As it is the DNA molecule and is double stranded. The complementary strands of DNA attached by the hydrogen bonding between complementary nucleotides (A,T, G, C). Here the Adenine of a strand base paired with the thymine residue of complementary strand by double bond. The guanine and cytosine is paired by forming triple hydrogen bond in the same way.

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:

Thus, the two complementary bases of DNA hold together the DNA by hydrogen bonds.

Therefore, option C is correct.

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