NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which colour form the amino acids that cointauins an alfa-amino group in a reaction with ninhydrine?
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violet-red
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violet-blue
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red-blue
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yellow-blue
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Explanation:
Detailed explanation-1: -Which colour is developed in ninhydrin test? The reaction of ninhydrin with an amino acid results in the creation of Ruhemann’s purple, a dark purple compound.
Detailed explanation-2: -The ninhydrin test is a chemical test useful to identify ammonia, primary/secondary amines, or amino acids. In this test, ninhydrin reagent is added to the test material, resulting in the production of deep blue colour, also known as Ruhemann’s purple, in the presence of an amino group.
Detailed explanation-3: -Imino acids, e.g. proline and hydroxyproline, react with ninhydrin to give a yellow color.
There is 1 question to complete.