How Are the Opposing Pathways of Glycolysis and Gluconeogenesis Prevented

question 67

Multiple Choice

How are the opposing pathways of glycolysis and gluconeogenesis prevented from extensive futile cycling?

• A) At least seven of the enzymes in the two pathways are different.
• B) Key enzymes are regulated in a coordinated and reciprocal manner.
• C) Catabolic and anabolic pathways do not take place in the same cellular compartments.
• D) The overall free-energy change always favors the catabolic pathway.
• E) Gluconeogenesis involves three endergonic bypass reactions.

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Definitions:

Total Volume

The cumulative amount or quantity of something, often referring to production output or sales in a business context.

Unit Contribution Margin

The amount each unit sold adds to profit, calculated by subtracting variable costs associated with a product from the sales price per unit.

Break-even Point

The juncture where total expenses match total income, resulting in neither a net profit nor a loss.

Fixed Expenses

Costs that do not change with the level of production or sales, remaining constant over a specified period.