Question

which enzyme builds messenger rna (mrna) during the process of transcription, forming the bonds between the nucleotides as they are assembled?
rna polymerase
rna synthetase
dna polymerase

Explanation:

During transcription, RNA polymerase synthesizes mRNA by adding nucleotides and forming phosphodiester bonds between them. RNA synthetase is involved in amino - acid activation for translation, and DNA polymerase is for DNA replication, not mRNA synthesis during transcription.

Answer:

RNA polymerase