NCIt definition : All the reactions in an organism concerned with storing and generating metabolic energy
and with the biosynthesis of low-molecular weight compounds, energy-storage compounds,
and basic materials needed for important life processes. It does not include nucleic
acid and protein synthesis.;
Alternative definition : NCI-GLOSS: The chemical changes that take place in a cell or an organism. These changes
make energy and the materials cells and organisms need to grow, reproduce, and stay
healthy. Metabolism also helps get rid of toxic substances.;