Ninhydrin test or Ninhydrin reagent

Ninhydrin (2,2-Dihydroxyindane-1,3-dione) is a chemical used to detect ammonia or primary and secondary amines. When reacting with these free amines, a deep blue or purple color known as Ruhemann’s purple is produced. Ninhydrin is most commonly used to detect fingerprints, as the terminal amines or lysine residues in peptides and proteins sloughed off in fingerprints […]

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  • Updated December 8, 2018

Biochemistry MCQ bank 2

1. Which of the following is true? a) In exergonic reactions, free energy of the products is lower than the reactants. b) If a reaction is endergonic the products are of lower free energy than reactants c) Entropy is the amount of order in energy d) Free energy is kinetic energy 2. Which of the […]

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  • Updated April 4, 2015
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