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

Identify $P, Q,$ and $R$ in the following descriptions:
$P -$ The component that undergoes transformation in a chemical reaction.
$Q -$ The component formed as a result of transformation in a chemical reaction.
$R -$ The component that remains unchanged after the completion of a chemical reaction.
What are $P, Q,$ and $R$ respectively?

Enzymes are basically or all enzymes contain:

Which of the following is used to compare the catalytic efficiency of two different enzymes?

The enzyme aldolase is an example of which class of enzymes?

What is the complex formed by the binding of an enzyme and a substrate called?