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Proteins give blue colour with
- a)Benedict's reagent
- b)iodine solution
- c)ninhydrin reagent
- d)biuret
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Proteins give blue colour witha)Benedict's reagentb)iodine solutio...
When protein is boiled with a dilute solution of ninhydrin
(triketo hydrindin), a blue colour is produced.
Protein + ninhydrin solution 
Blue colour
Blue colourMost Upvoted Answer
Proteins give blue colour witha)Benedict's reagentb)iodine solutio...
Explanation:
Ninhydrin Reagent:
- Proteins give a blue color with ninhydrin reagent due to the reaction between the amino acids present in proteins and ninhydrin.
- Ninhydrin reacts with the amino acids to form a blue-purple complex, which is used as a qualitative test for proteins.
Benedict's Reagent:
- Benedict's reagent is used to test for the presence of reducing sugars, not proteins.
- When heated in the presence of reducing sugars, Benedict's reagent changes color from blue to green, yellow, orange, or red depending on the amount of sugar present.
Iodine Solution:
- Iodine solution is used to test for the presence of starch, not proteins.
- Iodine solution changes color from brown to blue-black in the presence of starch.
Biuret:
- Biuret reagent is used to test for the presence of peptide bonds in proteins.
- When proteins are mixed with biuret reagent, a violet color change indicates the presence of peptide bonds.
In conclusion, proteins give a blue color with ninhydrin reagent, not with Benedict's reagent, iodine solution, or biuret. This is because of the specific reaction between amino acids in proteins and ninhydrin, which forms a blue-purple complex.
Ninhydrin Reagent:
- Proteins give a blue color with ninhydrin reagent due to the reaction between the amino acids present in proteins and ninhydrin.
- Ninhydrin reacts with the amino acids to form a blue-purple complex, which is used as a qualitative test for proteins.
Benedict's Reagent:
- Benedict's reagent is used to test for the presence of reducing sugars, not proteins.
- When heated in the presence of reducing sugars, Benedict's reagent changes color from blue to green, yellow, orange, or red depending on the amount of sugar present.
Iodine Solution:
- Iodine solution is used to test for the presence of starch, not proteins.
- Iodine solution changes color from brown to blue-black in the presence of starch.
Biuret:
- Biuret reagent is used to test for the presence of peptide bonds in proteins.
- When proteins are mixed with biuret reagent, a violet color change indicates the presence of peptide bonds.
In conclusion, proteins give a blue color with ninhydrin reagent, not with Benedict's reagent, iodine solution, or biuret. This is because of the specific reaction between amino acids in proteins and ninhydrin, which forms a blue-purple complex.
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Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer?
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Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer?.
Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Proteins give blue colour witha)Benedict's reagentb)iodine solutionc)ninhydrin reagentd)biuretCorrect answer is option 'C'. Can you explain this answer?.
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