A Series of Enzymes Catalyze the Reaction X → Y

question 23

Multiple Choice

A series of enzymes catalyze the reaction X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.
-What is substance X?

• A) a coenzyme
• B) an allosteric inhibitor
• C) a substrate
• D) an intermediate
• E) the product

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Definitions:

Cost Of Goods Sold

Direct spending on materials and labor required to produce the merchandise a company sells.

Operating Expenses

The costs associated with the day-to-day activities of a business, excluding costs directly tied to the production of goods or services, such as rent, utilities, and salaries.

Merchandising Company

A business that purchases finished goods for resale in order to earn a profit, without transforming these goods.

Wholesale Parts Company

A business entity that specializes in purchasing and selling automotive, machinery, or electronic parts in large quantities at lower prices, primarily to retailers or repair shops rather than end consumers.