How to say "biochemistry" in Japanese

• 生化学せいかがくCommon
  nounCovers biochemistry as a field of study: the science of chemical substances and processes in living organisms. The common word, used across university courses, research papers, and general scientific writing.
  生化学せいかがくの試験しけんはやさしかった。↗

  The biochemistry test was a cinch.
• 生物化学せいぶつかがく
  nounA less common name for exactly the same field, not a separate sense. You are more likely to meet it in reading than to need it yourself; 生化学 is usually the word to reach for.

Both words name the same science, the study of chemical processes in living organisms; use 生化学, the common term, in ordinary contexts, and treat 生物化学 simply as a less common synonym.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 生化学せいかがくbiochemistry
• 生物化学せいぶつかがくbiochemistry