practicing dna transcription and translation answer key
A strands unwind, exposing the coding region. Elongation RNA polymerase moves along the DNA, synthesizing the mRNA strand by adding complementary nucleotides. The base pairing rules are: Adenine (A) pairs with Uracil (U) in RNA (instead of Thymine in DNA). Cytosine (C) pairs with Guanine (G). Guanin