In the interdependent pathways in metabolism, _____ enzymes are predominant.

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BlackTom AI · Accepted Answer

The question asks about which type of enzymes are predominant in interdependent pathways of metabolism.

First, consider what interdependent metabolic pathways require: coordinated regulation to ensure flux through multiple connected reactions is balanced. Enzymes that regulate such networks typically do so by changing their activity in response to cellular signals, without the need to synthesize new enzymes.

Allosteric enzymes fit this role well because they possess regulatory sites separate from the active site. Binding of effectors at these allosteric sites can increase or decrease catalytic activity, enabling rapid and reversible control of pathway flux in response to metabolite levels. This allows fine-tuned, coordinated responses across multiple steps of a pathway, which is essential when pathways are interdependent.

In contrast, if one imagines enzymes that are constitutively active, or those controlled only by covalent modification without allosteric regulation, the dynamic, balanced regulation required for interdependent pathways would be harder to achieve. Allosteric control provides the flexibility and sensitivity needed for integrated metabolic regulation.

Because the question targets the predominant mechanism for coordinating interconnected steps, the emphasis is on regulatory strategies that respond to the metabolic state of the cell, which is a hallmark of allosteric enzymes.

Note: the absence of listed answer options means we cannot compare all alternatives directly here, but the rationale centers on the central role of allosteric regulation in coordinating multiple steps within interconnected metabolic networks.

BIOL3611.13541.202610 ClassMeeting23Quiz

In the interdependent pathways in metabolism, _____ enzymes are predominant.

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