What type of operon is illustrated in Model 1? Consider the operon in Model 1. Other than the gene that regulates the operon, how many genes are contained within the operon? In Model 1, where on the DNA strand does RNA polymerase bind to start transcription, the promoter, the operator or the terminator? Which direction is the RNA polymerase moving in Model 1? In which diagram of Model 1 is transcription and translation occurring successfully, diagram A or diagram B? Justify your answer with evidence from Model 1. Consider the nonscience meaning of the following terms. Match the purpose with each of these sections in the operon in terms of gene transcription. Promoter Spot where transcription ends Operator Spot where transcription begins Terminator On/Off switch Refer to diagram A in Model 1. a. What protein does the regulatory gene in Model 1 produce? b. To what section of the operon does this protein bind? c. Propose an explanation for why transcription is not occurring in diagram A. Model 1 - An Inducible Operon Diagram A Promoter Operator Terminator Regulatory Gene DNA: Gene X | Gene Y | Gene Z RNA polymerase mRNA Repressor. protein Diagram B Promoter Operator Terminator Regulatory Gene DNA Gene X Gene Y Gene Z RNA polymerase 3' 5' mRNA Active Inducer Inactive Protein X Protein Y Protein Z repressor molecule repressor protein protein