The "lock and key hypothesis", given be Emil Fischer, attempts to explain the mechanism of:
1. denaturation of enzyme proteins
2. the formation of peptide binds
3. sharing of electrons
4. enzyme specificity

At about \(0^\circ C\) , most enzymes are
1. inactive
2. active
3. destroyed
4. replicated

If an active-site directed inhibitor is present in the medium, the curve that will represent the progress of the chemical reaction will be shown by the letter:

If an non active-site directed inhibitor is present in the medium, the curve that will represent the progress of the chemical reaction will be shown by the letter:

1. D
2. C
3. B
4. A

Which of the following will fit in the description of a competitive enzyme inhibitor?
1. a highly reactive compound.
2. a metal ion such as Hg²⁺ or Pb²⁺.
3. structurally similar to the substrate.
4. water insoluble.

A non-competitive inhibitor of an enzyme catalyzed reaction
1. binds to the Michaelis complex (ES).
2. increases Vmax.
3. is without effect at saturating substrate concentrations.
4. can actually increase reaction velocity in rare cases.

The measurement of which of the following would be indicator of the degree of inhibition by a competitive enzyme inhibitor?
1. V_max
2. The y-intercept on a Limeweaver-Burke Plot
3. Km
4. ¼ V_max

An allosteric inhibitor of an enzyme usually
1. binds to the active site.
2. participates in feedback regulation.
3. denatures the enzyme.
4. causes the enzyme to work faster.

A change in an amino acid located distantly from the active site of an enzyme can affect the specificity of the enzyme towards its substrate by:

The property of water that enables it to
stabilize temperature in bodies of organisms
and thus makes it indispensible for life is:
1. High specific heat
2. High latent heat of fusion
3. High latent heat of vaporization
4. High cohesion and adhesion