Biology · May / June 2020 · Paper 41 · Question 2

one mark per row:

substance

enzyme

product(s)

starch

amylase

maltose / glucose / (simple) sugar(s)

fat

lipase

fatty acid(s) and glycerol

protein

protease / pepsin / trypsin

amino acids

;;;

any four from:

biological washing powder is more effective, at lower temperatures / between 10 °C and 40 °C / 10 °C and 43 °C ; comparative data quote for the difference at a stated temperature ;

biological washing powder removes all stain between 30 °C and 40 °C ;

non-biological removes all stain only at 60 °C ;

effectiveness is similar, at high temperatures / between 50 and 60 °C ;

same trend, below 30 °C / at low temperatures / from 50 °C ;

idea of effectiveness of biological washing powder decreases between 40 °C and 44 °C, no such decrease for non- biological washing powder ;

any two from:

active site changes shape ;

substrate no longer fits into, enzyme / active site ;

no enzyme-substrate complex / no successful collisions ;

any two from:

individual people have, different / unique, DNA ;

DNA has genes or alleles have, sequences of bases ;

AVP ;