Definition of campaign ribbon. : a narrow ribbon-covered bar or strip of ribbon whose distinctive coloring indicates a military campaign in which the wearer has taken part.
In each of these bases, the nitrogen of the secondary amine bonds to the deoxyribose in the backbone. DNA consists of two strands running in opposite directions. The hydrophobic nitrogenous bases are on the inside, hidden from water. Hydrogen bonds between the nitrogenous base hold the two strands of DNA together. These hydrogen bonds are base specific. That is, A (adenine) can form hydrogen bonds only with T (thymine). C (cytosine) can form hydrogen bonds only with G (guanine). The thymine-adenine pair interacts through two hydrogen bonds.
A: Nucleotides are held together by two types of bonds: phosphodiester bonds and hydrogen bonds. Education Portal describes phosphodiester bonds as bonds that link nucleotides into linear chains. According to Cambridge Physics, hydrogen bonds act as a bridge that connects two parallel rows of nucleotides.