Enzymes with Spectrophotometer

I created this video with the RUclips Video Editor ( / editor )

[@welishegerald2900]

Thanks for saving me , I had course work about that experiment

[@sasuke-6521]

What textbook is that?
And could I meet you by any chance online, I require some advice for an experiment I am conducting. I am in the International Baccalaureat Board, and in 12th grade.