Across
- 4. The _______ of enzymes depend on the temperature and the pH of the surroundings
- 6. chemical reaction that occurs inside the cells of living things.
- 10. the place on an enzyme where the substrate binds.
- 11. a substance that increases the rate of a chemical reaction by lowering the activation energy without being used up in the reaction.
- 13. the molecule or molecules on which an enzyme acts.
- 14. main enzyme in the stomach, which chemically digests protein.
- 17. it is estimated to be around _______ different enzymes in the human body.
- 18. a protein that acts as a biological catalyst, increasing the rate of a biochemical reaction.
Down
- 1. organ system that breaks down food, absorbs nutrients, and eliminates any remaining waste.
- 2. process that occurs when one or more substances, called reactants, is changed into one or more new substances, called products.
- 3. energy needed to start a chemical reaction.
- 5. organic molecules, such as glucose, that organisms use for chemical energy.
- 7. act by lowering the energy needed to start a chemical reaction
- 8. organic compound made up of amino acids.
- 9. the ability to do work.
- 12. sac-like organ of the digestive system between the esophagus and small intestine in which both mechanical and chemical digestion take place.
- 15. long, narrow, tube-like organ of the digestive system between the stomach and large intestine that carries out most of the chemical digestion and nutrient absorption.
- 16. At higher temperatures, an enzyme’s shape deteriorates, also known as _________
