Name the scientist who for the first time isolated and purified the enzyme urease in crystalline form from Jack bean (Canavalia ensiformis).

Enzymes that catalyse the removal of groups of atoms from substrate molecules,other than by hydrolysis,leaving double bonds are -

The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options $(A-D)$ are the components of the reaction labeled as $A, B, C,$ and $D$ identified correctly?

In the modern system of nomenclature,which one of the following enzymes occupies the $6^{th}$ position?

Which class of enzymes catalyzes the covalent bonding of two substrates?

What type of enzymes are used in the process of digestion?