Chapter 4

Question 1

collagen us formed by

Answer 1

post translational modification

Question 2

reactions to from collagen in the absence of vitamin C

Answer 2

cannot form stabilized bonds and it can cause scurvy

Question 3

silk primary structure

Answer 3

amino acid repeat GSGAGA

Question 4

silk’s structure in three dimensions

Answer 4

1) fully extended polypetide chains for strength
2) strands by hydrogen bonding for flexible
3) sheets by van der Waals and hydrophobic interactions flexible

Question 5

intrinsically unstructured proteins

Answer 5

do not have a discrete three-dimensional structure, but has versatile characteristics that means one protein can assume different structures creating different biochemical functions

Question 6

metamorphic proteins

Answer 6

structures of approximately equal energy that are in equilibrium

Question 7

3 things about disulfide bridges

Answer 7

• forms between two cysteine residues
• can exist between two amino acid residues on the same chain
• have a stabilizing effect on proteins

Question 8

which structure has myglobin and hemoglobin

Answer 8

-tertiary and then quaternary

Question 9

the major force controlling tertiary protein structure

Answer 9

hydrophobic effect

Question 10

5 steps of folding a globular protein

Answer 10

• formation of secondary structure
• formation of foains through aggregation
• molten globule formation
• adjustments in the conformation of domains
• final protein monomer formation