Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers

تمرين 1

The enzyme ______________ synthesizes RNA from the instructions in DNA. DNA has two strands, but for any given gene, only one strand, called the ______________ strand, is transcribed. To begin transcribing a gene, this enzyme binds to a specific sequence of DNA bases located at the beginning of the gene. This DNA sequence is called the ______________. Transcription ends when the enzyme encounters a DNA sequence at the end of the gene called the ______________.