Reference no: EM132537546
The following activity will give you practice with the two operons we discussed - the lac operon and the trp operon. Below are two scenarios to consider. You will need to determine whether or not transcription is occurring and describe what is happening in the cell using our operon vocabulary words - regulatory gene, RNA polymerase, operator, promoter, repressor, genes, inducer and corepressor.
1. Bobby Joe just enjoyed an In and Out milkshake, how will the E. coli in her gut respond?
a) For the lac operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw or describe what will be happening on the operon below.
b) Will transcription occur? YES NO
c) Describe what is happening (with vocabulary words).
2. Bobby Joe just drank a dairy-free boba drink, how will the E. coli in her gut respond?
a) For the lac operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw or describe what will be happening on the operon below.
b) Will transcription occur? YES NO
c) Describe what is happening (with vocabulary words).
3. Bobby Joe just enjoyed a turkey sandwich (turkey is high in tryptophan), how will the E. coli in her stomach respond?
a) For the trp operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw what will be happening on the operon below.
b) Will transcription occur? YES NO
c) Describe what is happening (with vocabulary words).
4. Bobby Joe has been fasting, how will the E. coli in her stomach respond?
a) For the trp operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw what will be happening on the operon below.
b) Will transcription occur? YES NO
c) Describe what is happening (with vocabulary words).
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