Question

what will happen if rna polymerase fails to attach to the promoter?
translation will begin early.
transcription will not begin.
rna polymerase will unwind dna strands.
an mrna strand will be made before translation begins.

Explanation:

Transcription is the process of synthesizing RNA from a DNA template. RNA polymerase binds to the promoter region on DNA to initiate transcription. Without this binding, transcription cannot start. Translation is the process of making proteins from mRNA and is not directly affected by RNA - polymerase - promoter binding in terms of starting early. RNA polymerase unwinds DNA strands during transcription initiation which requires promoter binding first. And an mRNA strand is made during transcription which cannot occur without RNA polymerase - promoter binding.

Answer:

Transcription will not begin.