Across
- 4. a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.
- 5. a substance produced during a natural, chemical, or manufacturing process:
- 7. the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.
- 8. a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
Down
- 1. a region on an enzyme that binds to a protein or other substance during a reaction.
- 2. a substance that takes part in and undergoes change during a reaction.
- 3. the surface or material on or from which an organism lives, grows, or obtains its nourishment:
- 6. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change: