The backbone of DNA is formed by bonds that connect sugar and phosphate through:

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Prepare for the TEAS 7 Scientific Reasoning Test with interactive questions, flashcards, and insightful explanations. Enhance your knowledge and gear up for exam success!

Multiple Choice

The backbone of DNA is formed by bonds that connect sugar and phosphate through:

Explanation:
The backbone is formed by covalent bonds called phosphodiester linkages, which connect the sugar of one nucleotide to the phosphate of the next. This creates a strong sugar–phosphate chain with directionality from 5' to 3'. The bases stick out from this backbone and pair with their partners on the opposite strand through hydrogen bonds, which hold the two strands together but do not form the backbone. Ionic or metallic bonds aren’t the way the DNA strands are linked in biological systems.

The backbone is formed by covalent bonds called phosphodiester linkages, which connect the sugar of one nucleotide to the phosphate of the next. This creates a strong sugar–phosphate chain with directionality from 5' to 3'. The bases stick out from this backbone and pair with their partners on the opposite strand through hydrogen bonds, which hold the two strands together but do not form the backbone. Ionic or metallic bonds aren’t the way the DNA strands are linked in biological systems.

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