Question

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, and genes. 1. Bobby Joe just enjoyed an In and Out milkshake, how will the E. coli in her stomach respond? a) For the lac operon, will the repressor or RNA polymerase be bound to the operon in this situation? Draw what will be happening on the operon below. OPERATOR Lactose Enzyme b) Will transcription occur? c) Describe what is happening (with vocabulary words). YES NO 2. Bobby Joe just enjoyed a turkey sandwich (turkey is high in tryptophan), how will the E. coli in this situation? Draw what will be happening on the operon below. PROMOTERİ OPERATOR |Tryptophan Enzyme 1 |Tryptophan Enzyme 2 ryptophan Ernme in her stomach respond? a) For the trp operon, will the repressor or RNA polymerase be bound to the operon b) Will transcription occur? c) Describe what is happening (with vocabulary words) YES NO Practice with Operons 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 vocabulary words- regulatory gene, RNA polymerase, operator, promoter, repressor, and genes. 1. Bobby Joe just enjoyed a dairy-free Boba drink, how will the E.coli in her stomach respond? in this situation? Draw what will be happening on the operon below not transcription is occurring and describe what is happening in the cell using our operon a) For the lac operon, will the repressor or RNA polymerase be bound to the operon

Answer 1

1) Yes it will ocuur because as Joey had milkshake, it contains lactose and as as promoter and operator are present, lactose will cleave off repressor from the operator and RNA polymerase will attach to the promoter and transcription will take place and it will make both lacZ that is beta galactosidase and lacY that is lac permease gene.