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wow, i did something totally different, my experiment was closer to the fermentation experiment in chem., if u do chem , you'd know what i mean. u place ur substrate and enzyme in your test tubes, u put cottonwool in the test tubes so gas can escape and bacteria won't get in, then u weighed it...

this years was much harder than last years i reckon, and i think a band 6 is when u got 90+, it was like that for school certificate.

PFC's isn't just the only type of artificial blood, they also use saline and water based nutrient carriers, well that's what i put and that artiificial blood was a universal blood type.