do not allow breakdown / breakup unqualified 1 [5] M12. (a) (i) B 1 one (ii) any from: largest area of / most digestion (of lipid) • allow agar / jelly / mixture broken down / digested do not allow digestion of bacteria / lipase ignore digestion by bacteria largest clear area • 1 (b) any two from: effect of pH / pH described • effect of temperature • effect on different types of lipid / fat • cost or allergic reactions or effect on skin / fabrics / or • environment or interaction with other chemicals in powder or shelf life 2 (c) enzymes / named enzyme denatured / destroyed allow active site(of enzyme) altered 1 [5]
do not allow breakdown / breakup unqualified 1 [5] M12. (a) (i) B 1 (ii) any one from: • largest area of / most digestion (of lipid) allow agar / jelly / mixture broken down / digested do not allow digestion of bacteria / lipase ignore digestion by bacteria • largest clear area 1 (b) any two from: • effect of pH / pH described • effect of temperature • effect on different types of lipid / fat • cost or allergic reactions or effect on skin / fabrics / or environment or interaction with other chemicals in powder or shelf life 2 (c) enzymes / named enzyme denatured / destroyed allow active site(of enzyme) altered 1 [5]
b3_digestion_mark_scheme.docx