Which term describes the web of all enzyme-catalyzed reactions in a cell?

The term that describes the web of all enzyme-catalyzed reactions in a cell is metabolism. Metabolism encompasses all the biochemical processes that occur within a living organism, which includes both the breakdown of molecules to produce energy (catabolic reactions) and the synthesis of new molecules (anabolic reactions). Enzymes play a crucial role in facilitating these reactions by lowering the activation energy, thus allowing the biochemical reactions to proceed efficiently.

Digestion specifically refers to the breakdown of complex food substances into simpler molecules that can be absorbed by the body, which is just one aspect of metabolic processes. Homeostasis refers to the maintenance of stable internal conditions within an organism, not specifically related to enzyme-catalyzed reactions. Respiration typically refers to the biochemical processes that produce energy through the consumption of oxygen and the release of carbon dioxide, which is a subset of metabolic actions. Therefore, metabolism is the most encompassing term for all enzyme-catalyzed reactions within a cell.