A.
Four identical subunits
✓
B.
A non protein chemical component
✓
C.
A macromolecular substrate
✓
D.
An allosteric inhibitor
✓
B.
Electrostatic stabilization
✓
D.
General acid catalysis
✓
C.
Bimolecular encounter of enzyme and substrate
✓
D.
Conformational change
✓
A.
Acting as a molecular scaffold
✓
B.
Shuttling protons and electrons such as NAD? or FAD
✓
C.
Forming a thioester bond
✓
D.
Transferring methyl groups
✓
A.
Act as the primary nucleophile
✓
B.
Form a hydrogen bond with histidine and enhance its basicity
✓
C.
Bind the N terminus of the substrate
✓
D.
Donate a proton directly to the leaving group
✓
A.
Amide group of asparagine
✓
B.
Hydroxyl group of serine activated to an alkoxide ion
✓
C.
Methyl group of alanine
✓
D.
Guanidinium group of arginine
✓
A.
Accepting a proton to increase pH
✓
B.
Forming a Schiff base and acting as an electron sink
✓
D.
Binding to the allosteric site
✓
D.
Hydrophobic interaction
✓
A.
Single step induced fit
✓
B.
Activation of a water molecule by a metal bound hydroxide for direct nucleophilic attack
✓
C.
Formation of a covalent phospho enzyme intermediate
✓
D.
Intercalation of hydrophobic amino acids into DNA
✓
