"Biosynthetic" refers to something that is made or created by a living organism, typically through its natural processes. It involves the production of a substance or material within a living organism using its own biochemical mechanisms.
Characterization of Biosynthetic Pathways for the Production of the Volatile Homoterpenes DMNT and TMTT in Zea mays (btiscience.org)
The loss of biosynthetic pathways indicates that F. tularensis is an obligate host - dependent bacterium in its natural life cycle. (sanger.ac.uk)
LPS - activated macrophages undergo metabolic reprogramming with a major increase in glycolysis, which is required for ATP production and also the generation of biosynthetic intermediates. (nobelprizemedicine.org)