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QuestionBiochemistry

The "backbone" of the DNA molecule is made up of two alternating components. What are these called?
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Step 1
: Understand the question and recall relevant information

The backbone of a DNA molecule is made up of repeating units known as nucleotides. Each nucleotide consists of a sugar molecule, a phosphate group, and a nitrogenous base. There are four types of nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T). The sugar and phosphate groups form the sugar-phosphate backbone of the DNA molecule.

Step 2
: Identify the components of the DNA backbone

The backbone of a DNA molecule is made up of alternating sugar and phosphate groups. More specifically, the sugar molecule in one nucleotide is connected to the phosphate group in the next nucleotide, creating a sugar-phosphate bond. This forms the "spine" of the DNA molecule, to which the nitrogenous bases are attached.

Final Answer

The components of the DNA backbone are alternating deoxyribose sugars and phosphate groups, which form a sugar-phosphate backbone.

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