biochemistry

noun

1. (uncountable)The chemistry of those compounds that occur in living organisms, and the processes that occur in their metabolism and catabolism; the study of such chemistry.

   “My aunt has a degree in biochemistry.”

2. (countable)The chemical characteristics of a particular living organism.

   “The biochemistries of fungal and bacterial cells are quite distinct.”

   “They [viruses] use more varied biochemistry than cellular life, storing their genetic information as both single- and double-stranded DNA as well as RNA.”

3. (countable)The biochemical activity associated with a particular chemical or condition.

   “Our study compared the biochemistries of epilepsy and Parkinson's.”

   “The biochemistry of NO differs from that of NO₂.”