Testing For Biological Molecules - Topic 1 Flashcards
1
Q
Benedict’s test
A
Reducing sugars
2
Q
Benedict’s test - method
A
Add Benedict’s reagent to a food sample and leave in water bath at 75 degrees celsius
3
Q
Benedict’s test - results
A
Blue ➡️ green, yellow, brick red
4
Q
Iodine test
A
Starch
5
Q
Iodine test - method
A
Add iodine solution to a food sample and mix.
6
Q
Iodine test - results
A
Browny-orange ➡️ blue-black
7
Q
Biuret test
A
Proteins
8
Q
Biuret test - method
A
Add potassium hydroxide solution to a food sample, followed by some copper (II) sulfate solution
9
Q
Biuret test - results
A
Blue ➡️ purple
10
Q
Emulsion test
A
Lipids
11
Q
Emulsion test - method
A
Add ethanol to a food sample and shake for a minute. Pour the solution into water.
12
Q
Emulsion test - results
A
Milky emulsion
