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:

RNA polymerase binds to the promoter region of DNA to initiate transcription. If it fails to attach, transcription (the process of making mRNA from DNA) cannot start. Translation is the process of making proteins from mRNA and occurs after transcription. RNA polymerase unwinding DNA strands is part of the transcription process which requires it to be bound to the promoter. Making an mRNA strand (transcription) also requires RNA polymerase binding to the promoter.

Answer:

Transcription will not begin.