Proteins:
Key elements
- Carbon, hydrogen, nitrogen, oxygen
- Nitrogen is different from other elements
Monomers
- Amino acids
- Linked together by dehydration synthesis
Polymers
- polypeptides(2-100)
- protein(100+)
- by-product: water
- Alpha-helix
- A complex structure of polypeptides in coils or sheets
Two groups
- Essential
- Cannot synthesize
- Must get from diet
- Non-essential
- Can synthesize in your body
Lipids:
- Organic molecules
- They contain carbon
- Found in oils/fats/waxes
- Are non-polar(hydrophobic)
Key elements
- Carbon, hydrogen, oxygen
Many lipids are formed by the attachment of three fatty acids to glycerol
Unsaturated
- If a lipid molecule contains at least one double covalent bond
- Examples
- Avocados
- Olives
- Peanut butter
Saturated
