B$)$ If the total enzyme concentration $[$E T $]$ in Part A is $0\mathrm{.}002$ M$,$ calculate the turnover number,

k cat $,$ of

the enzyme for substrate A in terms of min $1.$ Round your answer to the nearest hundred. Please do

not include a unit in your submitted answer on Canvas.

C$)$ Calculate

k cat $/$

K M of enzyme E for substrate A in terms of nM $1$ min $1.$ Round your answer to the

nearest whole number. Please do not include a unit in your submitted answer on Canvas.

D$)$ The catalytic efficiency $($

k cat $/$

K M $)$ of enzyme E for a different substrate $($compound X$)$ is $15$ nM $1$ min $1.$

At cellular substrate concentrations, which substrate $($A or X$)$ does enzyme E convert to product more

efficiently?