If E Coli Bacteria Are Grown in the Presence of Lactose

question 74

Multiple Choice

If E. coli bacteria are grown in the presence of lactose, then the repressor will

• A) not bind the operator allowing transcription of the lac operon genes.
• B) not bind the operator preventing transcription of the lac operon genes.
• C) bind the operator preventing transcription of the lac operon genes.
• D) bind the operator allowing transcription of the lac operon genes.
• E) coli bacteria are grown in the presence of lactose, then the repressor will

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Definitions:

Groundwater

Water that is found underground in the cracks and spaces in soil, sand, and rocks, forming aquifers.

Cement

A powdery substance made by calcining lime and clay, mixed with water to form mortar or mixed with sand, gravel, and water to make concrete.

Permeability

The ability of a material, especially soil or rock, to allow fluids to pass through it via an interconnected network of pores.

Porosity

A measure of how much of a rock is open space, which can hold fluids such as water, oil, or gas.