Proteins 1

A native conformation is
The biologically active form of a protein
The primary structure of a protein
The secondary structure of a protein
The form a protein takes when it is heated
Which statement is true?
Phi torsion angle is around the Ac-cooh bond
Phi torsion angle is around the Ac-Nh2 bond
Psi rotation is around the Ac-cooh bond
Psi anf phi angels are very different in an alpha helix
Rotation is restricted by
Steric hinderence
Partial double bond character of the peptide bond
Interactions between R groups
All of the above
How many AA's per turn of an alpha helix
9.4
4.9
3.6
6.3
Tertiary proteins
Contain a mix of A helix and B sheer
Contain only A helix
Contain only B sheet
All of the above
Which of these is NOT a property of globular proteins?
Tightly folder
Waler solB
Lipid solB
Contain hydrophobic interactions
Which AA can form disulfide bridges?
Serine
Tryptophan
Cysteine
Alanine
Which protein has a quarternary structure?
Heamoglobin
Aromatase
Collegen
Milk
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