Proteins

Question 1

secondary structure

Answer 1

alpha helixes and beta pleated sheets
driven by chemistry of amine
parallel or anti parallel promoted by bulky residues

Question 2

tertiary structure

Answer 2

di sulfide bonds. made by oxidation, cleaved by reduction. is a thiol exchange
Beta barrels and coiled coils (2x alpha helixes round each other)

Question 3

Quaternary

Answer 3

multiple polypeptide chains come together

Question 4

Globular

Answer 4

individual units eg enzymes and anitbodies
recognition, catalysis, transport

Question 5

Fibrous

Answer 5

Creates long structures. Structural integrity eg collagen, silk

Question 6

Membrane proteins

Answer 6

need to get chemicals over hydrophobic membrane

Question 7

Antibodies and receptors

Answer 7

v. specific for recognition

Question 8

Enzymes

Answer 8

lowers Ea, provides a reaction environment and brings together in optimum geometry

Question 9

structural proteins

Answer 9

fibrous, builds structural integrity