AP BIOLOGY

Detailed explanation-1: -Complementary base pairing is the phenomenon where in DNA, guanine always binds to cytosine and adenine always binds to thymine. Guanine and cytosine share three hydrogen bonds while adenine and thymine always share two hydrogen bonds. RNA replaces thymine (T) with a different pyrimidine base called uracil (U).

Detailed explanation-2: -Complementary base pairing is the phenomenon where in DNA guanine always hydrogen bonds to cytosine and adenine always binds to thymine. The bond between guanine and cytosine shares three hydrogen bonds compared to the A-T bond which always shares two hydrogen bonds.

Detailed explanation-3: -Guanine always bonds with cytosine, which makes them a pair of complementary bases. Adenine always bonds with thymine, making them DNA’s other pair of complementary bases. These pairs form the “rungs” of the DNA ladder.

Detailed explanation-4: -Guanine pairs with cytosine, and adenine pairs with thymine in DNA. Interstrand hydrogen bonds are responsible for this pairing.

Detailed explanation-5: -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.