FA - PROTEINS

What is the primary purpose of the Kjeldahl method in protein analysis?

• Measure protein content
• Measure carbohydrate content
• Measure nitrogen content
• Measure lipid content

Which step in the Kjeldahl method involves breaking down organic matter?

• Digestion
• Titration
• Filtration
• Neutralization

What is the role of sulfuric acid in the Kjeldahl method?

• Acts as a catalyst
• Decomposes proteins
• Removes lipids
• Precipitates nitrogen

Which gas is released during the digestion phase of the Kjeldahl method?

• Carbon dioxide
• Ammonia
• Nitrogen gas
• Hydrogen gas

How is the nitrogen content measured in the Kjeldahl method?

• Titration
• Spectrophotometry
• Colorimetric reaction
• Gravimetric method

Which factor is used to convert nitrogen content to protein content?

• 6.25
• 4.6
• 5.5
• 7.0

What is one advantage of the Kjeldahl method?

• High accuracy
• High sensitivity
• Standardized method
• Widely used

What is a key disadvantage of the Kjeldahl method?

• Time-consuming
• Low reproducibility
• High cost
• Slow process

Which method is considered an alternative to the Kjeldahl method?

• Dumas method
• Kjeldahl method
• Biuret method
• UV-Vis method

What is the principle behind the Dumas method?

• Combustion
• Titration
• Redox reaction
• Electrochemical reaction