Question

Chains of enzyme reactions in a cell that regulate enzyme activity and energy flow are _____.

centrioles

metabolic pathways

activators

inhibitors

Answer 1

Centrioles aren't it - those are totally separate organelles that form when cells divide.

Activators are molecules that make other molecules more active. Inhibitors are molecules that make other molecules less active. So if you think of a sequence of activators and inhibitors that all affect each other - you'd come up with a metabolic pathway that determines how active a molecule is.