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The ribosome binding site

  • A.forms a stem-loop structure in the RNA
  • B.is located upstream of the promoter sequence
  • C.is located immediately upstream of the start codon
  • D.is more likely to be associated with an operon than with a gene encoding a single protein

Answer: C

Correct answer: is located immediately upstream of the start codon

The ribosome binding site sits a short distance upstream of the start codon - typically 5 to 10 bases - and that spacing is what positions the initiating AUG in the P site. The promoter is further upstream still, and is where transcription begins rather than translation.

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