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1. The DNA double helix is held together by two types of bonds, covalent andhydrogen. Covalent bonds occur within each linear strand and strongly bond thebases, sugars, and phosphate groups (both within each component and betweencomponents).Hydrogen bonds occur between the two strands and involve a basefrom one strand with a base from the second in complementary pairing.ovalent bonds occur within each linear strand and strongly bond thebases, sugars, and phosphate groups (both within each component and betweencomponents). Hydrogen bonds occur between the two strands and involve a basefrom one strand with a base from the second in complementary pairing.
Number of Hydrogen Bonds Between Base Pairs. April 24, 2010, charm, Leave a comment. How many hydrogen bonds are there between base pairs? Not more than 3 Hydrogen bonds. In a DNA strand, there are two base pairs consisting of Guanine, Cytosine, Adenine and Thymine. There are three hydrogen bonds for the base pair Guanine and Cytosine, and two hydrogen bonds for the base pair Adenine and Thymine. In RNA, Adenine pairs off with Uracil with two hydrogen bonds.