Mechanism for enzyme catalyzed reactions to explain the kinetics of enzyme-substrate reactions, michaelis final rate from -ra to

ra to r+a

Explanation: In an enzyme catalyzed reaction, enzyme binds with the active side(3D) of the substrate substrate. It provides an alternative path for the reaction to take place with lower activation energy. in the reaction the kinetic energy of the molecules increases so reaction takes place at a higher rate. when the reaction is completed enzyme leaves the active side.

it is the most commonly accepted one

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.