Shēngwù huàxué yánjiū shēngwùtǐ nèi fāshēng de gèzhǒng huàxué fǎnyìng.
Biochemistry studies the chemical reactions that take place inside living things.
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usage
Usually shortened to 生化, which also means "biochemical", as in 生化武器 "biological and chemical weapons" and the game title 生化危机 (Resident Evil). The word is simply 生物 "biology" + 化学 "chemistry".