Enzymes show the least amount of adaptation for which of the following?

In homeotherms,the enzymatic reaction occurs best at . . . . . . °$C$.

The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme green-gram-phosphatase. What does the graph indicate?

Which enzyme catalyzes the transfer of a group from one substrate to another?

At a temperature just below the freezing point,the enzyme:

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Aldolase	$(P)$ Hydrolases
$(2)$ Hexokinase	$(Q)$ Ligases
$(3)$ Succinic dehydrogenase	$(R)$ Lyases
$(4)$ Fructose isomerase	$(S)$ Oxidoreductases
$(5)$ Lactase	$(T)$ Transferases
$(6)$ Acetyl $CoA$ synthetase	$(U)$ Isomerases