Question

what is the function of rna polymerase in protein synthesis?
o it brings the trna to the ribosome.
o it bonds the dna strand.
o it unzips the dna strand.
o it translates the dna strand.

Explanation:

RNA polymerase is involved in transcription. During transcription, it unzips the DNA strand (by breaking hydrogen bonds between base - pairs) and uses one strand of DNA as a template to synthesize mRNA.

• Bringing tRNA to the ribosome is not the function of RNA polymerase. tRNA is involved in translation and its movement to the ribosome is part of the translational process which is not directly related to RNA polymerase.
• Bonding the DNA strand is not its role. DNA strands are bonded by hydrogen bonds between complementary base - pairs and this is not an active function of RNA polymerase.
• Translating the DNA strand is incorrect. Translation is the process of making proteins from mRNA (carried out by ribosomes), while RNA polymerase is involved in transcription (synthesis of mRNA from DNA).

Answer:

It unzips the DNA strand.