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

Enzymes have a very narrow optima for

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

The given graphical representation relates to enzyme activity under three conditions ($pH$,temperature,and substrate concentration). What do the given axes $X$ and $Y$ represent?
$X$-axis $-$ $Y$-axis

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?

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