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4.1 Biological Molecules IGCSE biology
Quiz by
ortcast13
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Last updated: April 5, 2024
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First submitted
April 5, 2024
Times taken
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Average score
20.0%
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Hint
Answer
chemical elements that make up carbs
oxygen, carbon and hydrogen
chemical elements that make up fats
oxygen, carbon and hydrogen
chemical elements that make up proteins
oxygen, carbon, nitrogen and hydrogen
molecules made from glucose
cellulose, glycogen and starch
proteins are made from
amino acids
molecules made from fatty acids and glycerol
fats and oils
biurrets test is for
proteins
positive result for biurets test
purple/lilac
negative result for biurets test
light blue
ethanol test is for
lipids
positive result for ethanol test
white emulsion
negative result for ethanol test
no white emulsion
test for starch
iodine test
Hint
Answer
positive result for the starch test
blue/black
negative result for the starch test
orange brown
benedicts test is for
glucose (reducing sugars)
positive result for benedicts test
green, yellow, orange and red percipitate
negative result for benedicts test
blue
DCPIP test is for
vitamin c
positive result for DCPIP test
colourless
negative result for DCPIP test
pink or blue
way to remember DCPIP
determined cats poo in pools
bases of DNA
A with T and C with G
how is it called when two strands are coiled together
double helix
what is the name of the chemicals that form the strtands
bases
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