Who suggested the proteinaceous nature of enzymes?

The enzyme $Lactate \text{ } Dehydrogenase$ belongs to which class of enzymes?

Which of the following enzymes becomes active in the presence of lipids?

In the given equation $E + S \rightarrow E-S \text{ Complex} \rightarrow E + P$, what does the part labeled "$a$" represent?

Enzymes catalysing the breakdown of larger molecules into smaller molecules are

Which of the following enzymes requires the presence of lipids for its activity?