E Coli Cells Are Placed in a Growth Medium Containing $\beta$

question 6

Essay

E. coli cells are placed in a growth medium containing lactose. Indicate how the following circumstances would affect the expression of the lactose operon (increase/decrease/no change).
(a) Addition of high levels of glucose
(b) A Lac repressor mutation that prevents dissociation of Lac repressor from the operator
(c) A mutation that inactivates $\beta$ -galactosidase
(d) A mutation that inactivates galactoside permease
(e) A mutation that prevents binding of CRP to its binding site near the lac promoter

---

Definitions:

Price Level

A metric that calculates the mean of present prices for all goods and services produced within the economy, relative to a reference year.

Consumer Price Index

An index that measures the average change in prices paid by consumers for a basket of goods and services over time, often used as an indicator of inflation.

Bureau of Labor Statistics

A U.S. government agency responsible for collecting and analyzing economic data related to labor market activity, working conditions, and price changes in the economy.

Market Basket

A selected collection of goods and services used to track price changes for the purpose of measuring inflation.