Part A - Operon vocabulary Can you match terms related to operons to their definitions? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. naloto operator promoter genes of an operon repressor regulatory gene operon inducer 1. A(n) is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway. 2. The 3. A(n) is a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place. 4. A(n) of genes. is/are arranged sequentially after the promoter. 6. A(n) codes for a protein, such as a repressor, that controls the transcription of another gene or group 5. Regulatory proteins bind to the to control expression of the operon. is a protein that inhibits gene transcription. In prokaryotes, this protein binds to the DNA in or near the promoter. 7. A(n) is a specific small molecule that binds to a bacterial regulatory protein and changes its shape so that it cannot bind to an operator, thus switching an operon on. Part B - Regulation of model operons The trp and lac operons are regulated in various ways. How do bacteria regulate transcription of these operons? Sort the statements into the appropriate bins depending on whether or not each operon would be transcribed under the stated conditions. lac operon: lactose present, glucose present operon is not transcribed lac operon: lactose absent lac operon: lactose present, glucose absent trp operon: tryptophan absent operon is transcribed, but not sped up through positive control trp operon: tryptophan present operon is transcribed quickly through positive control reset ? help