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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.
Biota of the Neritic Oceanic Zone This zone constitutes 75 per cent of the total oceanic area and is relatively rich in species and high in productivity owing to factors such
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What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?
Cost due to Damage to Equipment Cost due to Damage to Equipment, Property etc. Tooling may have to be redesigned, adding cost. Cost due to reduced output and delay
Why can it be said that a recessive allele can remain hidden in the phenotype of an individual and revealed only when manifested in homozygosity in the offspring? A recessive a
Respiratory Insufficiency Respiratory insufficiency usually indicate inadequate exchange of oxygen and carbondioxide to meet the needs of the body during normal activities.
How does the addition of a watery secretion to the contents of the gut help in the process of digestion?
Sarcodine protozoans are amoebas, and there are two types of them: shelled and naked. As you examine the prepared slides you should be able to see water expulsion vesicle, nucleus,
Carbohydrate characteristic chemical features include: Select one: a. the potential to form multiple hydrogen bonds. b. the existence of one or more asymmetric centers.
Stomatal Resistance Stomatal resistance is most important because gas exchange between leaves and external atmosphere takes place entirely through stomatal pores. Stomatal res
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