The type of the chemical bond form between the complementary nitrogenous bases is called hydrogen bonds.
What is the meaning of chemical bond?
A chemical bond seems to be what retains atoms in molecules around each other. Electrostatic attraction among positive electrode nucleons and electrons with negative charges produce bonds.
Hydrogen bonds are weak interactions formed when a carbon atom in one molecule interacts with an unpaired electron in another. In a DNA double helix, hydrogen bonds hold complementary base pairs together.
Therefore, it can be concluded that hydrogen bond forms the complementary nitrogenous bases.
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