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Explain the Indole Production Test?
Many microorganisms produce an enzyme tryptophanase which oxidizes amino acid tryptophan to produce pyruvic acid, indole and ammonia. We can analyze the production of tryptophanase by using SIM agar containing tryptophan. The presence of indole is then detected by adding Kovac's reagent which contains p-dimethyl amino benzaldehyde, butanol and hydrochloric acid. It produces a cherry-red reagent layer with indole (positive test).The role of acidified butyl alcohol is to extract the indole into the reagent layer which then react with dimethyl amino benzaldehyde.
excretory organs of different animals from protozoa to mammals
whats the difference in respiratory system in mammals,reptilia and amphibian?
Subphylum Trilobitomorpha Subphylum Trilobitomorpha involves the trilobites. All species are extinct and the fossils point out that they were all marine forms belonging to Pal
Congenital impotentia genarandi Some bulls which are otherwise normal and healthy produce semen containing spermatozoa with specific morphological abnormalities together with
What is ribose Browning in canned fish is commonly associated with ribose. Undesirable colour changes in shellfish during canning often involve metal ions, for example, the bl
Carboxypeptidase The inactive zymogen procarboxypeptidase is activated by trypsin .The further action on the polypeptides is carried out by carboxypeptidase which attac
OTHE R GLANDS - (i) Mammary glands - Study of mammary gland is mastology. Modified sweat gland. 4-5 pairs in rabbit. 1 pair in human. In opposum 25 pairs (max.).
Uterine Torsion Incidences of uterine torsions in cattle and buffaloes are not common. However, they are very common in heavy breeds and buffaloes and animals in slopy terrain
how do work in human body and animals
Who created the two-part naming system used in biology? The scientific naming system that is used worldwide today was primary devised by Swedish naturalist Carl Linnaeus in 173
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