Respuesta :

Because of transcription. Transcription is the first step, where the RNA is synthesized.

Protein synthesis is a two-part process because it needs mRNA that is produced by transcription.

Transcription:

It is the process by which cells produce mRNA from DNA by using RNA polymerase enzyme.

Translation:

It is the process by which cells produce protein by using ribosomes and mRNA.

Therefore, protein synthesis is a two-part process.

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