| Answer | Crossword Clue |
|---|---|
| provitamins | A substance that is converted into a vitamin within an organism |
| provitamin | A substance that is converted into a vitamin within an organism |
| zymogens | An inactive substance that is converted into an enzyme when activated by another enzyme |
| prodrug | inactive substance that is converted to a drug within the body by the action of enzymes or other chemicals |
| pepsinogen | A substance that is secreted by the stomach wall and converted into the enzyme pepsin by gastric acid |
| pepsinogens | A substance that is secreted by the stomach wall and converted into the enzyme pepsin by gastric acid |
