Question

what does the arrow indicate on the dna model? the junction of introns and exons in the sense strand of dna the hydrogen bond between complementary nucleotides the bond between adjacent phosphate and deoxyribose molecules the junction of a codon and a dna triplet

Explanation:

In a DNA model, the arrow typically points to the hydrogen - bond between complementary nucleotides. Complementary nucleotides (A - T and G - C) are held together by hydrogen bonds in the DNA double - helix structure. Introns and exons are related to gene structure and not what the arrow usually indicates. The bond between adjacent phosphate and deoxyribose forms the sugar - phosphate backbone. Codons are in mRNA and not related to this simple DNA model feature shown.

Answer:

The hydrogen bond between complementary nucleotides