| A | B |
|---|
| Protein is made of | keratin |
| What percent protein | 91% |
| memory sentence for elements | Charles Has No Socks On |
| 5 elements | Carbon, Hydrogen, Nitrogen, Sulfur, Oxygen |
| Elements join to make | amino acids |
| Amino acids join to make | polypeptide chains |
| 2 polypeptide chains join to make | a helix |
| Amino acids are joined by_____ bonds | peptide bonds or end bonds |
| What builds the hair? | the amino acids with peptide or end bonds |
| What breaks the the peptide or end bonds? | only chemicals |
| 3 types of side bonds | salt, hydrogen, and disulfide |
| Which bonds shape the hair? | side bonds |
| Which bond is broken by water and reformed by heat? | hydrogen |
| Which bond is broken and reformed only by chemicals? | disulfide or sulfur bonds |
| How strong is the disulfide bond? | VERY STRONG |
| How strong is the hydrogen bond? | very weak |
| How many hydrogen bonds are there? | Lots of these |
| How many disulfide or sulfur bonds are there? | Fewer of these |
| What will break a salt bond? | pH (acidity or alkalinity) |
