In Biology we have been studying Enzymes, and we went to the lab and did an experiment on Enzymes and pH. I worked with Bauti, Luli and Luz.
Many plant tissues change colour when exposed to the air. The enzymes that produce the coloured products may be affected by pH.
Aim: investigate the effect of pH on the production of these coloured products formed on the freshly cut surface of a plant tissue
First we had to cut 2 pieces of banana of 1cm wide. We had to leave one exposed to the air and the other one in a petri dish and covered with orange juice and leave them for half an hour.
After half an hour…
Colour of exposed surface: darker
Colour of surface covered with orange juice: same initial color
The piece of banana in the orange juice with acidic Ph, didn`t let the colour enzymes work and so it stayed the same.The high acidic Ph that in the orange juice produced a change in the active site and so the substrate didn’t fit anymore.