Protein Detection Tests Quiz

What color does the Biuret Test turn when proteins are present?

• Violet

• Red

• Blue

• Green

What does the Ninhydrin Test indicate when it turns deep blue or purple?

• Presence of carbohydrates

• Presence of proteins or amino acids

• Presence of nucleic acids

• Presence of lipids

What color may appear in the Ninhydrin Test when proline is present?

• Blue

• Red

• Yellow

• Green

Which amino acids are involved in the Xanthoproteic Test?

• Sulfur-containing amino acids

• Basic amino acids

• Aromatic amino acids

• Aliphatic amino acids

What color does the solution turn in the Xanthoproteic Test when aromatic amino acids react with nitric acid?

• Blue

• Yellow

• Purple

• Orange

What happens to the yellow color in the Xanthoproteic Test upon neutralization with an alkali?

• It turns blue

• It remains yellow

• It deepens to orange

• It disappears

What is the primary chemical reaction involved in the Biuret Test?

• Reaction with lipids

• Reaction with peptide bonds

• Reaction with amino acids

• Reaction with carbohydrates

Which test would you use to detect the presence of proteins in a solution?

• Iodine Test

• Sudan III Test

• Benedict's Test

• Biuret Test

What is the main reagent used in the Ninhydrin Test?

• Biuret

• Nitric acid

• Sodium hydroxide

• Ninhydrin

Which of the following tests can indicate the presence of amino acids?

• Xanthoproteic Test

• Biuret Test

• Ninhydrin Test

• All of the above