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The sugar-phosphatebackboneand the nitrogenous bases (adenine, thymine, cytosine, guanine) of the DNA polymer. It's important to note the different pairing bonds (twohydrogenbonds for A-T and three hydrogen bonds for C-G).In a DNA polymer, there are several parts that can be labeled. Here are the main parts:Sugar-Phosphate Backbone: The DNA polymer consists of a backbone made up of alternating sugar (deoxyribose) and phosphate molecules. The sugar and phosphate groups are connected by covalent bonds.NitrogenousBases: The DNA polymer has four nitrogenous bases - adenine (A), thymine (T),cytosine(C), and guanine (G). These bases pair up with each other to form the rungs of the DNA ladder. Adenine pairs with thymine, held together by two hydrogen bonds, while cytosine pairs with guanine, held together by three hydrogen bonds.To label the parts of the DNA polymer, you can follow these steps:Identify the sugar-phosphate backbone by locating the repeating sugar andphosphategroups. These groups are connected by covalent bonds.Identify the nitrogenous bases. Adenine (A) and thymine (T) form a base pair, connected by two hydrogen bonds. Cytosine (C) and guanine (G) also form a base pair, connected by three hydrogen bonds.By labeling these parts, you can have a clear understanding of the structure of a DNA polymer.The sugar-phosphate backbone and the nitrogenous bases (adenine, thymine, cytosine, guanine) of the DNA polymer. It's important to note the different pairing bonds (two hydrogen bonds for A-T and three hydrogen bonds for C-G).To know more aboutbackbonevisit:brainly.com/question/30052045#SPJ11...