Question

Choose all of the correct statements about protein structure. Hint: For each level of structure, only one statement is correct.

	Primary structure is due to covalent bonding between amino acids.
	Primary structure is due to hydrogen bonding between amino acids.
	Primary structure is due to hydrogen bonding, ion-ion interactions, and van der Waals interactions between amino acids.
	Secondary structure is due to covalent bonding between amino acids.
	Secondary structure is due to hydrogen bonding between amino acids.
	Secondary structure is due to hydrogen bonding, ion-ion interactions, and van der Waals interactions between amino acids.
	Tertiary and quaternary structure is primarily due to covalent bonding between amino acids.
	Tertiary and quaternary structure is primarily due to hydrogen bonding between amino acids.
	Tertiary and quaternary structure is primarily due to the hydrophobic effect, hydrogen bonding, ion-ion interactions, and van der Waals interactions.