Transgenic Animals: Methods Of Production, Examples & Applications

What are Transgenic Animals? Transgenic means that one or more DNA sequences from another species have been introduced by artificial means. Animals usually are made transgenic by having a small sequence of foreign DNA injected into a fertilized egg or developing embryo. Transgenic animals are animals which have been genetically transformed by splicing and inserting … Read more Transgenic Animals: Methods Of Production, Examples & Applications

Phylum Platyhelminthes- Characteristics, Classification And Example

The representatives of the phylum Platyhelminthes are commonly known as the flatworms or tapeworms. The word ‘Platyhelminthes’ is derived from the Greek word, ‘platy’ meaning flat and ‘helminth’ meaning worm. They are simple soft-bodied, bilaterian, unsegmented invertebrate animals. The Phylum Platyhelminthes makes up the 4th largest phylum among the animal kingdom. But among the acoelomate … Read more Phylum Platyhelminthes- Characteristics, Classification And Example

Iodine Test: Description, Principle, Procedure And Result Interpretation

What Is Iodine Test? The iodine test was first described by J.J Colin and H.F Gaultier de Claubry and independently by F. Stromeyer in 1884. The iodine test is used to test for the presence of starch in a given analyte. The test can be qualitative or quantitative. Objective Of Iodine Test To test for … Read more Iodine Test: Description, Principle, Procedure And Result Interpretation

Tollens’ Test: Description, Principle, Procedure And Result Interpretation

What Is Tollens’ Test? Tollens’ test also referred to as silver-mirror test is a qualitative laboratory test used to distinguish between aldehyde and ketone. The test is named after a German chemist, Bernard Tollens who discovered the test. The test involves use of Tollens’ reagent which must be prepared immediately prior to its use as … Read more Tollens’ Test: Description, Principle, Procedure And Result Interpretation

Fehling’s Test: Description, Reagent, Principle, Procedure & Result Interpretation

What Is Fehling’s Test? The Fehling’s test was developed by German chemist Hermann von Fehling in 1849. It is generally a test for reducing sugars and non-reducing sugars; and also a supplementary to the Tollens’ reagent test. The test can also be used to differentiate between water-soluble carbohydrate and ketone functional groups. Objectives of Fehling’s Test To detect the presence of carbohydrates in a solution. To … Read more Fehling’s Test: Description, Reagent, Principle, Procedure & Result Interpretation

Biuret Test: Principle, Reagent, Procedure &Result Interpretation

What Is Biuret Test? Biuret test is a chemical test used for detecting the presence of peptide bonds in a given analyte. Biuret test is also referred to as Piotrowski’s test, the name of Gustaw Piotrowski, a polish physiologist who first devised and explained the test in 1857.  In presence of peptide bonds, a copper … Read more Biuret Test: Principle, Reagent, Procedure &Result Interpretation

Lead Sulfide Test (Lead Acetate Test): Description, Principle, Procedure & Result Interpretation

What Is Lead Sulfide Test? Lead sulfide test also referred to as lead acetate test is a biochemical test for the detection of amino acids like cysteine and cystine. The test is a specific test for the detection of amino acids containing sulfur, S-S group in cysteine and S-H group in cysteine. It is important … Read more Lead Sulfide Test (Lead Acetate Test): Description, Principle, Procedure & Result Interpretation

Ninhydrin Test: Principle, Reagent Preparation, Procedure And Result Interpretation

What Is Ninhydrin Test? The ninhydrin test is a chemical test which is used to check whether a given analyte contains amines or alpha-amino acids. In this test, the main reactant is ninhydrin which is a hydrocarbon with a chemical compound with the formula C9H6O4. By IUPAC nomenclature standards name, ninhydrin is also referred to … Read more Ninhydrin Test: Principle, Reagent Preparation, Procedure And Result Interpretation

Pauly’s Test: Principle, Reaction, Reagent, Procedure And Results

What Is Pauly’s Test? Pauly’s test is a chemical test to detect the amino acid histidine and tyrosine, this test is named after the German chemist Hermann Pauly, who first described it. In this test, when proteins containing either tyrosine or histidine are reacted with diazotized sulfanilic acid under alkaline conditions to form dark red … Read more Pauly’s Test: Principle, Reaction, Reagent, Procedure And Results