AP BIOLOGY

Detailed explanation-1: -These enzymes “unzip” DNA molecules by breaking the hydrogen bonds that hold the two strands together. Each strand then serves as a template for a new complementary strand to be created.

Detailed explanation-2: -Key enzyme involved in DNA replication, it is responsible for ‘unzipping’ the double helix structure by breaking the hydrogen bonds between bases on opposite strands of the DNA molecule.

Detailed explanation-3: -In general, DNA is replicated by uncoiling of the helix, strand separation by breaking of the hydrogen bonds between the complementary strands, and synthesis of two new strands by complementary base pairing.

Detailed explanation-4: -The process of breaking the hydrogen bonds between the nucleotide base pairs in double-stranded DNA requires energy. To break the bonds, helicases use the energy stored in a molecule called ATP, which serves as the energy currency of cells.

Detailed explanation-5: -Answer and Explanation: In a DNA molecule, the complementary nitrogenous bases are held together through the use of hydrogen bonds. During DNA replication, the enzyme DNA helicase breaks these hydrogen bonds to separate the two strands of DNA in order to give space to the other enzymes involved in the process.