Across
- 2. Acids that are compounds consisting of carbon, oxygen, hydrogen and nitrogen
- 4. If atoms combine that are different, the resulting molecule is a ...........
- 6. When giving .............. services, you are affecting all of the side bonds
- 8. Have a negative electrical charge (-)
- 10. Amino acids join together in chains to become ............
- 13. Hair is a form of protein called ...................
Down
- 1. This bond is the backbone of all protein molecules and it is very important not to disturb them
- 3. Have no electrical charge
- 5. Is two or more atoms joined together by a chemical bond
- 7. Is made of 97% keratin protein and 3% trace minerals
- 9. Have a positive electrical charge (+)
- 11. Hydrogen bond, salt bond, disulfide bond, Van der Waal's forces
- 12. The smallest complete unit of an element