Across
- 1. anything that has weight and takes up space
- 4. single, positive charge
- 6. sugars with 6-carbon atoms
- 7. organic substance that is soluble in water
- 10. two or more atoms bond together and form a new particle
- 14. contain 2 simple sugar building blocks
- 17. proteins that serve as biological catalysts
- 18. when atoms of different elements combine
- 19. number number of protons in the atom of a particular element
- 20. molecules that contain both carbon and hydrogen atoms
- 22. single, negative charge
Down
- 2. glycerol with 3 fatty acids
- 3. uncharged and electrically neutral
- 5. nucleic acid molecule,consisting of sugar, nitrogenous base and phosphate group
- 8. structural materials,energy sources, hormones, receptors on cell surfaces
- 9. build to cell parts and to supply energy for cellular activity
- 11. basic chemical substance
- 12. tiny invisible particles that make up elements
- 13. measurement unit of hydrogen ion concentration; indicate acid or akaline
- 15. building block of proteins
- 16. atoms that become electrically charged by gaining or losing electrons
- 21. weight number of protons plus number of neutrons