In physiology, we often talk about metabolic pathways such as glycolysis, gluconeogenesis or cholesterol synthesis. What is the best description of metabolic pathway?
A) any reaction that has two or more reactants
B) an enzymatic reaction involving binding of substrates to the active site of the enzyme
C) a chain of reactions in the cell where activation energy increases from step to step
D) a sequence of reactions that use products from the previous step as substrates for the next

Question

Quizplus · Accepted Answer

A metabolic pathway is a sequence of reactions where the products of one reaction become the substrates of the next. Each step in a metabolic pathway is typically catalyzed by a specific enzyme, and the overall pathway can be regulated by cell signaling, feedback inhibition, or other mechanisms. Such pathways can involve a variety of molecules, including amino acids, nucleotides, lipids, and sugars, and can produce a wide range of cellular products, such as energy, building blocks for macromolecules, or signaling molecules.

In Physiology, We Often Talk About Metabolic Pathways Such as Glycolysis