In which process, identified in the image, is a mutation first able to develop?
a) transcription
b) post-transcription
c) translation
d) post-translation

A) Transcription

This is where most mutations can first occur.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products