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11 The diagram shows two food tests carried out on solution X.
test 1 test 2
biuret Benedict's
solution: solution
r) r)
C) ry
o o
——» —— {
heat
solution X purple solution X
colour
Which nutrients are present in solution X?
A protein and starch
B protein and sugar
C starch and fat
D sstarch and sugar
12 The data show the concentrations of sugar and starch in an onion.
total sugar incuding starch
lucing sugar 1g per 100g
/g per 100g
3.7 0.
The onion is tested with Benedict's solution and iodine solution.
Which set of results is correct?
Benedict's iodine
solution solution
A blue blue-black
B blue brown
c brick red blue-black
D brick red brown
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