Final answer:
True, metabolism includes all cellular chemical reactions contributing to life, encompassing catabolic reactions that release energy and anabolic reactions that require energy.
Step-by-step explanation:
In biology, a cell's metabolism encompasses the entirety of chemical reactions occurring within it. These reactions can be categorized into two primary processes: catabolism, which breaks down complex chemicals into simpler ones while releasing energy, and anabolism, which builds complex molecules from simpler ones and requires an input of energy. Examples of these metabolic pathways include glucose breakdown (catabolic) and glucose synthesis (anabolic).