Which of the following ions is $NOT$ required for the activity of the enzyme enolase?

Substances which enhance reactions after combining with enzymes are called

Which one is not true about vitamins?

$A$ co-enzyme is:

Select the correct pair of $X$ and $Y$.
\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau\tau

Column $X$	Column $Y$
$(1)$ Phosphatase enzyme	$(P)$ Molybdenum
$(2)$ Tyrosinase	$(Q)$ Fat
$(3)$ Intestinal enzyme	$(R)$ Copper
$(4)$ Carbonic anhydrase	$(S)$ Manganese
$(5)$ Glucose phosphatase	$(T)$ Zinc

The non-protein part of an enzyme is called: