A scientist who studies how chemical reactions happen inside living things, like how plants make energy from sunlight or how your body digests food.
Compound word: 'biochemistry' (from 'bio-' + 'chemistry') + '-ist' (one who practices). 'Bio-' comes from Greek 'bios' (life), 'chemistry' from Arabic 'al-kimia,' and '-ist' from Greek. The field emerged in the late 1800s as scientists began understanding life at the molecular level.
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