Ma'anar ƙamus na "biochemical mechanical" shine:Tsarin halayen sinadarai da tsarin da ke faruwa a cikin halittu masu rai, waɗanda ke da alhakin kiyayewa da daidaita ayyukan halittu daban-daban, kamar metabolism; girma, da haifuwa. Waɗannan hanyoyin sun haɗa da hulɗar kwayoyin halitta, irin su enzymes, sunadarai, carbohydrates, lipids, da acid nucleic, da kuma canza makamashi da kayan abinci zuwa nau'i mai amfani. Fahimtar hanyoyin sinadarai da ke cikin hanyoyin nazarin halittu yana da mahimmanci don haɓaka iliminmu game da tsarin rayuwa da haɓaka sabbin hanyoyin magance cututtuka.