Answer:
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Step-by-step explanation:
a.- Tertiary
b.-
A.- α-Helix
C.- Disulfide bridge
D.- Hydrogen bonding
E .- Hydrophobic interaction
B.- Ionic bond
20.-
2.- α-Helix and β pleated sheets
4.- Collagen and hemoglobin
1.- Determined by the sequence of DNA bases
2.- Form stabilized by hydrogen bonds
3.- Form stabilized by hydrogen bonds, ionic bonds, hydrophobic interactions and disulfide bridges.
4.- Globular proteins
4.- Interaction among several polypeptide chains
3.- Many enzymes
2.-Regular, repeated folding of the peptide chain
1.- Sequence of aminoacids in a protein