Base-Pair Rule in DNA: Adenine pairs with Thymine, Guanine pairs with Cytosine, with the DNA ladder sides composed of phosphate and sugar held together by hydrogen bonds.

Diagram illustrating the base-pair rule in DNA, showing adenine-thymine and guanine-cytosine pairing, with labeled components including deoxyribose (sugar), phosphate, and hydrogen bonds.

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Show Answer Key & Explanations Step-by-step solution for: DNA - The Double Helix

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- Adenine pairs with Thymine via two hydrogen bonds.
- Guanine pairs with Cytosine via three hydrogen bonds.
- The sugar-phosphate backbone forms the sides of the DNA double helix.
- Hydrogen bonds connect complementary nitrogenous bases across the strands.
- Deoxyribose (sugar) and phosphate groups alternate to form each strand’s backbone.

Parent Tip: Review the logic above to help your child master the concept of double helix worksheet.

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