The genes wmuA, wmuB, and wmuC are expressed on a polycistronic operon in the bacterium E. coli. What features must exist on the DNA for these genes to be correctly transcribed and translated?
a) Promoter sequences, terminator sequences, and ribosome binding sites.
b) Introns, exons, and enhancer sequences.
c) Start codons, stop codons, and transcription factors.
d) Restriction sites, recognition sequences, and regulatory elements.