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.
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).It is the 3Â´ -OH group thatis required to create the next phosphodiester bond.) The RNA is subsequentlyremoved and replaced with DNA so that no gaps exist in the final product. 4. Helicases are enzymes that disrupt the hydrogen bonds that hold the two DNAstrands together in a double helix.