**Major correction: I wrongly and repeatedly referred to T. Reesei as being a yeast, when it is actually another type of fungus. Yeast is also a type of fungus, so my comments about reaction conditions remain true, but it is incorrect to call T. Reesei a yeast. Or to say that the cellulase came from yeast. **small correction: I also said that 20ml of 20% , when it was supposed to be 25ml. For this video, I'm going to be doing exactly what the title says, and I'll be turning a roll of toilet p