Which of the following statements best describes a promoter?(multiple choice)
1.A set of adjacent structural genes and the operator gene thatcontrols them.
2.A portion of a gene, which is transcribed into RNA, but nottranslated into protein.
3.A sequence of nucleotides coding for a single gene productthat is transcribed into mRNA.
4.The section of DNA to which RNAP first attaches itself to wheninitiating the transcription of a structural gene.
5.A protein that blocks gene action with an operator site on theDNA.
