Biology 30 Crossword

3. made up of carbon, hydrogen, oxygen, nitrogen and sometimes sulfur.
7. A substance that brings out a chemical reaction without being changed itself.
8. Bind to active sites and prevent substrates from binding.
10. Always pairs with thymine.
12. Bonds holding a protein molecule are disrupted by physical or chemical means, causing a temporary change in shape.
14. Made up of nucleotides.
16. Another name for proteins.
18. Made up of an amino acid group and an acid group.
19. Regions on the surface of enzymes that fit the substrate.

1. Always pairs with cytosine.
2. Proteins that speed up chemical rections
3. the type of bond that holds together proteins.
4. Has ribose sugar, can leave the nucleus.
5. The amount of energy needed for a chemical reaction to occur.
6. Bonds holding a protein molecule are disrupted, causing a permanent change in shape.
9. A substance that enzymes act upon.
11. A type of nitrogen base in nucleotides that have two rings as part of their structure.
13. Composed of a five carbon sugar, a phosphate molecule and a nitrogen base.
15. Has deoxyribose sugar, stays in the nucleus.
16. Substance formed from the substrate at the end of a chemical reaction with an enzyme.
17. A type of enzyme that works on sucrose.