food tests Flashcards
1
Q
when there is reducing sugars present
A
benedicts solution turns from blue to yellow to red
2
Q
when there is protein present
A
biuret solution turns from blue to purple
3
Q
when there is starch present
A
iodine solution turns from orange to dark blue
4
Q
when there is lipids present
A
it precipitates and forms a milky white emulsion.
