In the Case of Shared Anabolic and Catabolic Pathways, the ____

Question

In the case of shared anabolic and catabolic pathways, the ____ serve as the points of regulation.
A) largest enzymes
B) ATP producing enzymes
C) NADH utilizing enzymes
D) rate-limiting enzymes
E) all are true

Accepted Answer

Rate-limiting enzymes are the enzymes that control the overall rate of the metabolic pathway. These enzymes are typically located at key branching points in the pathway, where the pathway can be directed down different routes depending on the needs of the cell. By regulating the activity of these enzymes, the cell can control the flux of metabolites through the pathway and maintain a balance between anabolic and catabolic processes.