Just like shaid replied, this post will make a good lecture note.Am confessing now, I have completely forgotten that H antigen is responsible for the reason why O blood group is a universal donor,and also responsible for why AB blood group is a universal recipient.Thanks for reminding me.
But I think that there is a typographical error under the discussion of cellulose, I guess you wanted to type Cellulase enzyme instead of cellulose as enzyme that break down cellulose.