Enzymes catalyse biochemical reactions by

An enzyme obtained from an animal source has been classified by the Enzyme Commission and allocated its unique four-digit number $1.2.1.4$. To which of the following classes does it belong?

Assertion $(A)$: All enzymes are made of proteins.
Reason $(R)$: All proteins act as enzymes.

In plants,enzymes are present:

In the enzyme which catalyses the breakdown of:
$H_2O_2 \rightarrow H_2O + O_2$
the prosthetic group is:

Electron transferring enzymes belong to