A Series of Enzymes Catalyse the Reactions in the Metabolic

question 61

Multiple Choice

A series of enzymes catalyse the reactions in the metabolic pathway 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) an allosteric inhibitor
• B) a substrate
• C) an intermediate
• D) the product

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Definitions:

Past-due Undisputed Debt

A debt that is acknowledged by the debtor but has not been paid by the agreed-upon due date.

Promisor

An entity or individual who makes a promise to perform a certain action or duty within a contract.

Promisee

The person to whom a promise or agreement is made, especially in a contract.

Age of Majority

The legal age at which an individual is considered an adult and capable of making legal decisions for themselves, such as entering into contracts and voting, varying by jurisdiction.