High Levels of Citric Acid Inhibit the Enzyme Phosphofructokinase

question 95

Multiple Choice

High levels of citric acid inhibit the enzyme phosphofructokinase.Citric acid binds to the enzyme at a different location from the active site.This is an example of

• A)competitive inhibition.
• B)allosteric regulation.
• C)the specificity of enzymes for their substrates.
• D)an enzyme requiring a cofactor.
• E)positive feedback regulation.

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Definitions:

Barriers To Entry

Factors that make it difficult for new competitors to enter an industry, often protecting existing companies from competition.

Demand Curves

A graphical representation used in economics to show the relationship between the price of a product and the quantity of the product that consumers are willing and able to purchase at various prices.

Long Run

When all costs become variable costs and firms can enter or leave the industry.

Covert Collusion

A secretive agreement among firms to fix prices, limit production, or divide markets, which is illegal and against regulatory policies.