Biology Chapter 9 Exam Prep | DNA Structure, Nucleotides & Replication

Biology Chapter 9 Exam Prep | DNA Structure, Nucleotides & Replication DNA contains the instructions for, and controls, the production of proteins helicase an enzyme that "unzips" DNA by breaking the hydrogen bonds that hold the two strands together between the nitrogen bases guanine a nitrogen base in DNA that pairs with cytosine base pairing a rule that states A = T and C = G cytosine a nitrogen base in DNA that pairs with guanine thymine a nitrogen base in DNA that pairs with adenine template a single DNA strand that serves as a guide for making the matching or complementary DNA strand deoxyribose the pentose (5-carbon) sugar that helps make up the backbones of DNA DNA replication the process of copying DNA to create identical strands complementary the new strand of DNA created during replication that matches the original strand of DNA by following the base-pair rule nucleotide the monomer (subunit) of DNA that consists of a phosphate, sugar, and a nitrogen base double helix the sh