this scientist has to inoculate the parent population using plates that contains penicillinin them. we call this approach the direct selection.
In the direct selection, bacteria is grown on a material that has penicillin in it. the goal is to find mutants that have resistance to penicillin. only these resistant ones would grow and then a direct identification would be done.
This is what I think that the answer is. Glycolysis consist of 10 rxn.....among them rxn 1 and 3 uses single ATP each <span> and .... rxn 6 and 9 produces 2 ATP each by substrate level phosphorylation</span> I hope that this helped you in anyway