Under which conditions do metabolic reactions generally occur at a slower rate?

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

Column $X$	Column $Y$
$(1)$ Transferases	$(P)$ Maltase
$(2)$ Hydrolases	$(Q)$ Hexokinase
$(3)$ Lyases	$(R)$ Fructose isomerase
$(4)$ Isomerases	$(S)$ Aldolase

As temperature changes from $3^o \,C$ to $45^o \,C$,the rate of enzyme activity will

Read the following statements:
$(a)$ Low temperature preserves the enzyme.
$(b)$ Enzyme activity increases above optimum temperature.
$(c)$ Enzyme gets denatured at high temperature.
$(d)$ Competitive inhibitor competes with the product formed.
Which of the following statements are true?

In the modern system of nomenclature,which one of the following enzymes occupies the $1^{st}$ position?

At which temperature do enzymes lose their native conformation?