Tests Flashcards
1
Q
Lipid test
A
Add ethanol
Add water
Shake
White emulsion appears
2
Q
Protein test
A
Biuret test identifies peptide bonds Add NaOH to solution Add CuSO4 and mix Purple is positive Blue is negative
3
Q
Starch test
A
Add iodine
Black is positive
4
Q
Test for reducing sugars
A
Add Benedicts solution and heat
Brown/red is positive
5
Q
Test for non reducing sugars
A
After failed reducing sugars test
Add dilute HCl and heat to break down disaccharides
Add NaHCO3 to neutralise
Add benedicts and heat
6
Q
When is spearman’s rank used?
A
- if you want to find out if there is a significant association between two sets of measurements
- you have between 7 and 30 sets of measurements
7
Q
When would you use chi squared
A
When you are checking whether your data is as expected
8
Q
When would you use statistics (standard error and 95% confidence limits)?
A
Use if comparing two means
