80 which gene expression is blocked in the lac operon system? (if wrong, answer will be reported). 1. the repressor protein destroys the genes required to produce enzymes. 2. lactose binds to the repressor and changes its shape. 3. the repressor protein blocks the genes from making mrna 4. rna polymerase begins transcribing the genes.

number 2. is the answer glad i could help Elena because When the lac operon detects lactose, it will bind to the lactose to stop gene expression.

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.