Which type of bonds connects sugar and phosphate in DNA backbone?

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Multiple Choice

Which type of bonds connects sugar and phosphate in DNA backbone?

Explanation:
The sugar–phosphate backbone is held together by covalent bonds called phosphodiester bonds. Each link forms when the phosphate group of one nucleotide ester-bonds to the 3' carbon of the sugar on the next nucleotide, creating a strong, repeating sugar–phosphate chain. This covalent linkage gives the backbone its stability and directionality. Hydrogen bonds, by contrast, form between complementary bases on opposite strands to hold the double helix together, not between sugar and phosphate in the backbone. Ionic and metallic bonds do not connect the sugar and phosphate in DNA.

The sugar–phosphate backbone is held together by covalent bonds called phosphodiester bonds. Each link forms when the phosphate group of one nucleotide ester-bonds to the 3' carbon of the sugar on the next nucleotide, creating a strong, repeating sugar–phosphate chain. This covalent linkage gives the backbone its stability and directionality.

Hydrogen bonds, by contrast, form between complementary bases on opposite strands to hold the double helix together, not between sugar and phosphate in the backbone. Ionic and metallic bonds do not connect the sugar and phosphate in DNA.

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