Module 4: Plant Chemical Composition Flashcards
1
Q
test for sugars
A
benedict’s test
2
Q
use for testing presence of starch
A
iodine solution
3
Q
testing presence of proteins
A
biuret’s test
4
Q
process of buiret’s test
A
4 mL 10% sodium hydroxide (OH) solution, few drops of 1% copper sulfate (CuSO4)
5
Q
test for presence of fats
A
grease spot’s test
6
Q
benedict’ test color changes
A
- blue - none
- green - traceable
- yellow - low
- orange - moderate
- red - high
7
Q
positive iodine test
A
blue/purple
7
Q
positive biuret test color
A
purple
7
Q
negative iodine test color
A
yellow/brown
8
Q
negative biuret test color
A
blue