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.
(Science: molecular biology) two nitrogenous base s (adenine and thymine or guanine and cytosine) held together by weak bonds. two strand s of dna are held together in the shape of a double helix by the bonds between base pair s. ~. A ~ is two chemical bases bonded to one another forming a rung of the DNA ladder.. The DNA molecule consists of two strand s that wind around each other like a twisted ladder.