Answer:
Correct answer: A. Transcription
Step-by-step explanation:
The first step in protein synthesis is transcription. In this step, the two strands in double DNA helix are separated and one of them is used as a model: an RNA sequence is synthesized from the original DNA.
Then, in a second step, this mRNA (messenger ribonucleic acid) will be used by ribosomes to make an amino acid sequence (primary protein structure).