Amino Acids & Proteins

Question 1

what are some of the biological roles of proteins?

Answer 1

• Transportation (Oxygen, Na/K Pump, glucose)
• Enzymes
• Motion - muscle contraction
• Skeletal support - collagen in bone and skin
• Immune protection (antibodys)
• Nerve impulse transmission

Question 2

Where are D & L isomers found? found separately

Answer 2

L-amino acids -> Proteins

D-amino acids -> Bacterial cell walls

Question 3

What are the 4 layers of protein structure?

Answer 3

Primary: amino acid structure
Secondary: arrangements of amino acids in space - alpha helix/beta sheet
Tertiary: 3D structure as a result of INTERACTIONS between R groups of amino acids
Quaternary: 3D interaction of different proteins to other polypeptide chains