Answer: a cell makes a RNA copy of the DNA
Step-by-step explanation:
Gene expression begins with transcription. To create an RNA molecule, the DNA sequence of a gene must be copied. RNA polymerases, which join nucleotides to create an RNA strand, carry out transcription (using a DNA strand as a template). Initiation, elongation, and termination are the three phases of transcription. After transcription, RNA molecules in eukaryotes need to be processed. They are spliced and given a 5' cap and poly-A tail at the ends. Each gene in your genome has a different transcription regulation mechanism.
the three stages of transcription are:
INITIATION: The promoter, a section of DNA located close to the start of a gene, is where RNA polymerase interacts. Each gene has its own promoter, or set of co-transcribed genes in bacteria. After binding, RNA polymerase divides the DNA strands into single strands, creating the template for transcription.
ELONGATION: RNA polymerase uses one DNA strand, known as the template strand, as a template. The polymerase creates an RNA molecule out of complementary nucleotides, creating a chain that extends from 5' to 3', as it "reads" this template one base at a time. Similar information is contained in the RNA transcript as in the non-template (coding) strand of DNA, but uracil (U) is used in place of thymine (T).
TERMINATION: Terminator sequences indicate that the RNA transcript is finished. They cause the transcript to be released from the RNA polymerase after it has been transcribed. The image below illustrates a termination mechanism that involves the creation of a hairpin in the RNA.