AP BIOLOGY

Detailed explanation-1: -Note that complementary base pairs are : A-T and G-C. So, to find the complementary strand, replace A by T, G by C and vice versa. The Adenine-Thymine base pair is held together by 2 hydrogen bonds while the Guanine-Cytosine base pair is held together by 3 hydrogen bonds.

Detailed explanation-2: -DNA base pair. Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together. The binding of these base pairs forms the structure of DNA .

Detailed explanation-3: -The bond that connects two complementary nucleotides is a hydrogen bond. Hydrogen bonds are formed between atoms with partial charges called dipoles. Hydrogen usually has a positive dipole and a more electronegative atom, like oxygen or nitrogen has a negative dipole.

Detailed explanation-4: -Complementary base pairs form between nucleotides on opposite strands of DNA in a molecule via hydrogen bonding. These bonds help hold the strands together by specific nucleotide pairing, adenine to thymine and guanine to cytosine.

Detailed explanation-5: -Nucleotides are full of groups that can participate in hydrogen bonds. The hydrogen-bonding capability of the bases are especially important for specific base pairing. What is hydrogen bonding? The structures of adenine and cytosine are shown below.