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

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Definitions:

Farmed Animal

pertains to domesticated animals raised in agricultural settings to produce commodities such as meat, dairy, and wool.

Commercial Fishery

The business or industry of catching, processing, and selling fish and seafood for profit.

Marine Fish

Fish species that inhabit saltwater environments, as opposed to freshwater species, playing crucial roles in marine ecosystems.

Aquaponics

A sustainable food production system that combines traditional aquaculture with hydroponics in a symbiotic environment.