Enzymes involved in the transfer of electrons are known as ...... .

Given below are the statements regarding enzymes. Choose the correct statements.
$i$. All enzymes are proteinaceous.
$ii$. Enzyme becomes more active at the temperature of $60^{\circ}C$ to $70^{\circ}C$.
$iii$. Enzymes have one or two active sites where substrate binds with the enzyme.
$iv$. Any increase or decrease in specific $pH$,enzyme activity is always enhanced.
$v$. Enzymes remain active to catalyze again after completion of first reaction.

What is common among amylase,rennin,and trypsin?

All enzymes are composed of which of the following?

At boiling temperature, an enzyme is:

The cause of specificity of an enzyme is