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Unit 3 past paper question
antimicrobial properties of a plant
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Cards (3)
Independent variable (AP)
Type of
plant
Dependent variable (AP)
the
area
of
zone
of
inhibition
Describe a method that can be used to study the antimicrobial properties of a plant extract.
grow bacteria
in a
nutrient agar
filter paper
discs soaked in plant extract placed on agar keep extract volume controlled use a
dish lid
incubate
for 24 hours and measure the
clear zone
