Explanation: Racemases are the class of Isomerases which catalyzes the intramolecular rearrangement and interconvert L and D stereoisomers. Like racemases another isomerase which catalyzes the intramolecular transfer of functional group is mutases.

Explanation: Inactive precursor is first cleaved to form active enzyme and this inactive precursor is known as a zymogen. Many proteolytic enzymes are first synthesized as an inactive precursor which further cleaved to form the active enzyme.

Explanation: Carboxylases are the example of ligases enzyme. Ligases are the class of enzyme which deals with the formation of C-C, C-S, C-O and C-N bonds.

Explanation: Binding energy is the free energy released when the enzyme-substrate complex is formed. This energy is used to lessen the activation energy. Binding energy can be maximum when the only correct substrate binds to the enzyme.

Explanation: Lock-and-key model is used to describe the enzyme-substrate complex. It is the binding process where the active site of an enzyme is complementary to the shape of the substrate. The binding of the substrate produces a conformational change in the enzyme is incorrect as the confirmation of enzyme changes only in the induced fit model.

Explanation: Enzymes involves more than one strategies to catalyze specific reactions. Acid-base catalysis, metal ion catalysis, and covalent catalysis are best-characterized mechanisms employed by an enzyme.

Explanation: Kat stands for katal, SI unit of enzyme activity. One katal is equals to the amount of enzyme that catalyzes the transformation of 1 mole of substrate per second. 1 katal = 1 mol sec-1.

Explanation: Irreversible inhibitor binds to the active site of the enzyme and destroys the functional group. These inhibitors are mostly toxic in nature. Statin drugs are the example of competitive inhibitors which is used to control cholesterol.

1/V = Km/Vmax [S] + 1/Vmax.

Explanation: Lysozyme is an enzyme which is present in secretions such as tears, sweat and found in egg white. Lysozyme cleaves the glycosidic bond that connects NAG and NAM of peptidoglycan cell wall.

Explanation: Isozymes are multiple forms of enzymes that have the same functions but differ in structure. For example, lactate dehydrogenase which catalyzes the conversion of pyruvate to lactate, it has five isoenzymes.