Side Bonds & Hair Pigment

The chemical bonds that join amino acids to each other are called:

• peptide bonds

• side bonds

• hydrogen bonds

• salt bonds

The bonds that account for the strength and elasticity of hair are the:

• side bonds

• peptide bonds

• polypeptide chains

• end bonds

There are three different types of side bonds in the cortex:

• polypeptide, hydrogen, and salt bonds

• salt, hydrogen, and peptide bonds

• hydrogen, salt, and disulfide bonds

• disulfide, bisulfide, and salt bonds

The strongest side bonds in the cortex are the:

• hydrogen bonds

• peptide bonds

• salt bonds

• disulfide bonds

A disulfide bond join the ________ atoms of two neighboring cysteine amino acids to create cystine.

• carbon

• hydrogen

• nitrogen

• sulfur

Disulfide bonds can be broken by:

• shampoo

• perms and relaxers

• heat

• water

A hydrogen bond is a physical side bond thsat is easily broken by:

• changes in pH

• permanent waves

• water or heat

• chemical relaxers

All natural hair color is based on the ratio of:

• eumelanin to melanin

• eumelanin to pheomelanin

• melanin to aniline

• keratin to melanin

The pigment thsat provides natural hair colors from red and ginger to yellow/blonde is:

• eumelanin

• red melanin

• melanin

• pheomelanin

All natural hair color is the result of the pigment located within the:

• cuticle

• pith

• cortex

• medulla