Question

which provides the master code needed for protein synthesis? dna rna mrna trna

Explanation:

DNA contains the genetic information (master code) that is transcribed into mRNA (messenger RNA) during transcription. mRNA then carries this code to the ribosomes for translation into proteins. RNA is a broader category (including mRNA, tRNA - transfer RNA which brings amino acids to ribosomes, etc.). So the original master code source is DNA.

Answer:

DNA