A Mutation in the LacI Gene Results in an Active

question 43

Multiple Choice

A mutation in the lacI gene results in an active repressor protein that can no longer bind allolactose.Which would be true of the phenotype of the mutant strain?

• A)It would be constitutive for β-galactosidase expression.
• B)It would overexpress lacZ.
• C)It would be the same as the wild-type strain.
• D)It would repress β-galactosidase when lactose is present.
• E)It would be overexpress β-galactosidase when lactose is present.

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Definitions:

Marginal Cost

The cost incurred by producing one additional unit of a good or service, crucial for decision-making in production and pricing strategies.

Total Cost

The complete cost of producing a specific quantity of output, combining both fixed and variable costs.

Marginal Cost

The additional cost incurred by producing one more unit of a product or service, crucial for economic decision-making and pricing strategies.

Diminishing Marginal Product

The principle that as more of a variable input is added to a fixed input, the additional output gained from each new unit of input will eventually decrease.