The $Km$ value of the enzyme is the value of the substrate concentration at which the reaction reaches to

The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options $(A-D)$ are the components of the reaction labeled as $A, B, C,$ and $D$ identified correctly?

The figure given shows the conversion of substrate into product by an enzyme. In which one of the four options,the components of the reaction labelled $a, b, c, \& \ d$ are identified correctly?
$(i)$ Potential energy
(ii) Transition state
(iii) Activation energy with enzyme
(iv) Activation energy without enzyme

The term -$ase$ is used for

Who first used the term "enzyme"?

Transferases catalyze the transfer of a group other than hydrogen between a pair of substrates. Which of the following groups is $NOT$ transferred by transferases?