Enzymes,vitamins,and hormones can be classified into a single category biologically because all of them $........$

What is an apoenzyme?

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.

The diagram illustrates energy changes in an enzyme-controlled reaction. Which of the following represents the lowering of the activation energy?

In plants,enzymes are present:

Which of the following groups contains only biocatalysts?