An Operon That Would Be Controlled by Both Presence of Lactose

question 133

Short Answer

An operon that would be controlled by both presence of lactose and low levels of glucose would need two control mechanisms: first, a(n) _______ system to turn on genes to use lactose when it is present, and then a positive regulation system to only turn on lactose metabolism genes in the absence of glucose.

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Definitions:

Break-Even Point

The point at which total costs and total sales are equal, resulting in no net loss or gain for the business.

Contribution Margin

The gap between income from sales and variable expenses, which is utilized to pay for fixed expenses and produce earnings.

Selling Price

Selling price is the amount a buyer pays to purchase a product or service from a seller.

Variable Cost

Costs that change in proportion to the level of goods or services produced, such as materials and labor costs.