NEW
Font size
WorksheetsProtein analysis
Total questions: 12
Worksheet time: 6mins
What are the general steps in the kjeldahl method?
Distillation - Digestion - Titration
Digestion - Distillation - Titration
Titration - Digestion - Distillation
Titration - Distillation - Digestion
The purpose of adding CuSO4 in the kjeldahl method is ...
for Sample destruction
Catalyst
Increasing the boiling point
Neutralizing the sample
The purpose of adding K2SO4 in kjedahl method is ...
to neutralize the sample
Increasing the boiling point
Catalyst
Sample destruction
During the distillation process, nitrogen is captured by boric acid in the form of ...
Nitrite
Nitrate
Ammonia
Urea
The end point of titration is determined by having .... color.
Green
Dark blue
Red
Pink
In general, how many percent of nitrogen content in the protein?
16%
17%
18%
19%
What is the difference between Dumas method and kjeldahl method?
Dumas method is Time consuming
Dumas methos has affordable equipment
Dumas method use hazard chemicals
Dumas method can analyze many samples
The purpose of adding potassium sodium tartrate in biuret method is ...
to stabilize the cupric ions
To produce peptic bonds
To complex with sodium hydroxide
To absorb color in spectrophotometer
The end point color of biuret method is...
Green
Red
Blue
Purple
The example of primary structure is ...
insulin
nucleic acid
myoglobin
hemoglobin
In Lowry Method, what kind of special reagent is added to the samples?
Tyrosin and Tryptophan residues
Folin Ciocalteau phenol
Biuret reagent
Lowry reagent
What is the most distinguishing element present in proteins?
Nitrogen
Sulfur
Carbon
Hydrogen
