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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.
T ypes of hormones - (i) Releasing and Inhibitory hormones - Hormones of hypothalamus and kidney (renin) which control secretion of trophic hormones. (ii) Trophic hormon
Propane boils at -46oC. Propanol boils at 97oC. The difference is attributable to- Select one: a. The fact that propanol is much heavier b. The fact that propanol ionizes all
Explain the Occurrence of Vitamin B 1 Vitamin B 1 occurs widely in the vegetable kingdom. The richest sources for vitamin B 1 , as you may already know, are yeast, grain ge
Define pisces
Thickness and toughness of plant walls are increased by deposition within original cellulose wall, of a substance called as lignin. Process of deposition is called: a) Lignific
Uses of Grafting Grafting helps to preserve and perpetuate varieties that cannot reproduce by vegetative method. Grafting changes less useful varieties to more desirable
briefly deccribe the eggs snd follicles
Q. What is the hematopoiesis? Hematopoiesis is the formation of blood cells with other constituent elements of the blood. Q. Where does hematopoiesis occur? Hematopoies
Explain about the Glycemic Index (GI)? In the previous sections, we have studied that some carbohydrates are rapidly digested and absorbed, some are digested slowly while some
Q. Classification of plant on the basis of their resemblances? Pliny seemed to have little interest in the classification of plant on the basis of their resemblances. He classi
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