Which sugar is found in the DNA backbone?

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Multiple Choice

Which sugar is found in the DNA backbone?

Explanation:
DNA's backbone is built from sugar-phosphate chains, with the sugar component being deoxyribose. The name “deoxy” reflects the absence of an oxygen atom at the 2' position, which distinguishes it from ribose—the sugar used in RNA. This structural difference helps make DNA more chemically stable. The other sugars listed don’t form the DNA backbone: glucose is a metabolic monosaccharide, lactose is a disaccharide, and ribose is the sugar of RNA. Therefore, deoxyribose is the sugar found in the DNA backbone.

DNA's backbone is built from sugar-phosphate chains, with the sugar component being deoxyribose. The name “deoxy” reflects the absence of an oxygen atom at the 2' position, which distinguishes it from ribose—the sugar used in RNA. This structural difference helps make DNA more chemically stable. The other sugars listed don’t form the DNA backbone: glucose is a metabolic monosaccharide, lactose is a disaccharide, and ribose is the sugar of RNA. Therefore, deoxyribose is the sugar found in the DNA backbone.

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