Biology 30 Crossword

3. A substance that brings out a chemical reaction without being changed itself.
7. made up of carbon, hydrogen, oxygen, nitrogen and sometimes sulfur.
9. Has ribose sugar, can leave the nucleus.
11. the type of bond that holds together proteins.
13. Bind to active sites and prevent substrates from binding.
15. Made up of nucleotides.
16. The amount of energy needed for a chemical reaction to occur.
18. A type of enzyme that works on sucrose.
19. Has deoxyribose sugar, stays in the nucleus.
20. Proteins that speed up chemical rections

1. Substance formed from the substrate at the end of a chemical reaction with an enzyme.
2. Regions on the surface of enzymes that fit the substrate.
4. Made up of an amino acid group and an acid group.
5. Another name for proteins.
6. Bonds holding a protein molecule are disrupted, causing a permanent change in shape.
8. Bonds holding a protein molecule are disrupted by physical or chemical means, causing a temporary change in shape.
10. Composed of a five carbon sugar, a phosphate molecule and a nitrogen base.
12. A type of nitrogen base in nucleotides that have two rings as part of their structure.
14. A substance that enzymes act upon.
16. Always pairs with thymine.
17. Always pairs with cytosine.