Cases of word usage

1) a kind of organic compound, especially a sugar or starch (carbohydrate)

2) an organic chemical substance formed in plants and animals, able to cause chemical changes without being changed itself (enzyme)

3) to be in a state of (social or political or personal) excitement or trouble; (to cause a substance) to change chemically through the action of organic bodies (especially yeast) that change glucose into alcohol, e.g. in beer, wine (ferment)

4) any of a number of organic substances which are present in certain foods and are essential to the health of people and animals (vitamin)