Across
- 3. A covalent bond that one amino acid is attached to anther amino acid.
- 8. monomer of disaccharide and polysaccharide.
- 11. monomer of polypeptide and proteins.
- 12. A subtance that cannot be turned into other subtance through chemical reactions.
- 15. polymer of amino acids
- 17. A kind of protein that defend against bacteria.
- 19. A reaction that H20 are decomposed.
- 20. Universal solvent.
Down
- 1. general name of fat and oils.
- 2. A bond that formed between a hydrogen atom covalently linked to an oxygen or a nitragen atom.
- 4. A important disaccharide that prove energy.
- 5. A substance consisting of two or more elements in a fixed ratio
- 6. A strong interaction between atoms.
- 7. Monomer of macromolecules
- 9. An electrical attraction between two ions.
- 10. The smallest unit that keeps the chemical properties of an element.
- 13. Anything that takes up space and has mass.
- 14. A reaction that form H2O.
- 16. A kind of protein that is the catalyze biochemical reactions.
- 18. Different atoms of an element that have the same number of proton, but different number of neutron.