The Biological Activity of Phosphofructokinase (An Important Enzyme in Anaerobic

question 173

Multiple Choice

The biological activity of phosphofructokinase (an important enzyme in anaerobic respiration) falls by 90% if the pH:

• A) falls by 1 unit.
• B) falls by 0.5 units.
• C) falls by 0.1 units.
• D) rises by 1 unit.

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Definitions:

Variable Costing

A method of inventory costing that includes only variable manufacturing costs - direct materials, direct labor, and variable manufacturing overhead - in the cost of a product.

Net Operating Income

Income from a company's operations, calculated by subtracting operating expenses from operating revenue, excluding income and expenses from non-operating activities.

Gross Margin

The difference between sales revenue and the cost of goods sold, expressed as a percentage of sales revenue, indicating the efficiency of a company in managing its production and labor costs.

Net Operating Income

A company's revenue minus its operating expenses, excluding taxes and interest, providing a measure of profitability from its core business activities.