Explain the indole production test, Biology

Assignment Help:

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.


Related Discussions:- Explain the indole production test

What are sori, What are sori? The word "sori" is the plural form of "so...

What are sori? The word "sori" is the plural form of "sorus". In ferns, a sorus (pl. sori) is a cluster of sporangia on the edge or underside of a fertile frond. In lots of spe

Direction of flow, Direction of flow--either towards or away from the trans...

Direction of flow--either towards or away from the transducer (positive or negative Doppler shifts). Timing-instantaneous velocity and direction of flow throughout the various

Consciousness as inner state, Q. Explain Consciousness as inner state? ...

Q. Explain Consciousness as inner state? Consciousness as inner state: We are conscious of thoughts, images, emotions and memories within ourselves though they may not have phy

How do contraceptive pills generally work, How do contraceptive pills gener...

How do contraceptive pills generally work? Contraceptive pills generally have the hormones estrogen and progesterone. If taken daily from the 4th day after menses the abnormal

Amazonian butterflies, The Amazon rainforest in South America is a biodiver...

The Amazon rainforest in South America is a biodiverse ecosystem. There are large numbers of plant and animal species making up the food web, including over 350 species of predator

Need for microbiological analysis of environment sample, Explain Need For M...

Explain Need For Microbiological Analysis of Environment Samples? Once the food is harvested, it passes through various operating steps before reaching the consumer. These step

Viruses, what is the crystallization of a virus? what is the importance of ...

what is the crystallization of a virus? what is the importance of this process?

Explain restrictive cardiomyopathy, Q. Explain Restrictive cardiomyopathy? ...

Q. Explain Restrictive cardiomyopathy? It is a systemic or idiopathic disorder of the myocardium with clinical and hemodynamic features of diastolic dysfunction, closely simula

What is physical accommodation, What is Physical Accommodation Physical...

What is Physical Accommodation Physical Accommodation is the actual physical deformation in the lens power. It is measured in diopters, e.g., if the focussing power of the eye

what is the optimum temperature for catalyses, Explain What is the optimum...

Explain What is the optimum temperature for catalyses? Ans) For any chemical reaction, the reaction rate enhances with temperature, so the higher the temperature, the earlier t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd