Covalent bonds on DNA connect which components to form the backbone?

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Study for the Campbell Biology Concepts and Connections Test. Explore flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

Covalent bonds on DNA connect which components to form the backbone?

Explanation:
DNA’s backbone is the sugar-phosphate chain. Covalent phosphodiester bonds connect the deoxyribose sugar of one nucleotide to the phosphate group of the next nucleotide, creating a continuous sugar–phosphate backbone along each strand. This backbone runs the length of the molecule, while the nitrogenous bases extend inward and pair with the opposite strand via hydrogen bonds. So the covalent link that forms the backbone is between the sugar of one nucleotide and the phosphate of the next.

DNA’s backbone is the sugar-phosphate chain. Covalent phosphodiester bonds connect the deoxyribose sugar of one nucleotide to the phosphate group of the next nucleotide, creating a continuous sugar–phosphate backbone along each strand. This backbone runs the length of the molecule, while the nitrogenous bases extend inward and pair with the opposite strand via hydrogen bonds. So the covalent link that forms the backbone is between the sugar of one nucleotide and the phosphate of the next.

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