(a)[2]
Suggest enzymes that could be included in a laundry detergent to break down stains consisting of: starch [BLANK] fat [BLANK]
(b(i))[3]
Describe in what way temperature affects Savinase activity differently from the way it affects a protease that works in the human stomach.
(b(ii))[2]
Suggest why laundry detergents containing Savinase also include chemicals that dissolve to produce an alkaline solution.
(b(iii))[4]
Once clothes have been washed with laundry detergents, the waste water may sometimes be discharged into the environment. This waste water contains inorganic phosphate ions, which are also present in fertilisers. Explain the harmful effect on aquatic life of releasing this waste water into the environment.